UniShield 4-Shelf Metal First Aid Cabinet, ANSI Class B Review (2026)

Is the UniShield 4-Shelf Metal First Aid Cabinet the right station for a high-risk industrial site?

Short answer: Yes — if shelf space is your constraint, this is the cabinet to buy. The UniShield 4-Shelf Metal First Aid Cabinet is the largest general-industry station in our lineup: a wall-mount metal chassis with an ANSI Class B fill and a fourth shelf that 3-shelf rivals simply don't have. Buyers who want a stated headcount rating should weigh the First Aid Only 90575 (100-150 person, $46 less), and kitchens should step up to the UniShield 4-Shelf Restaurant Cabinet — but for a plant, shop, or warehouse that keeps outgrowing its station, the extra shelf wins.

Wall cabinets are the fixed anchor of a facility first aid program — bought once, restocked forever. The practical differences between them come down to three things: how much they hold, what class of fill they arrive with, and what it costs to keep them full. This review works through all three for the UniShield 4-shelf, and positions it against the other six stations in our first aid cabinets collection. For format-level guidance — cabinet vs portable kit vs trauma kit — start at the which first aid kit do you need pillar guide; for the ranked field, the best first aid cabinets buyer's guide.

Editorial verdict: 4.5/5. The UniShield 4-Shelf Metal Cabinet is the shelf-space leader of our Class B lineup at $189.95 — the station for facilities whose first aid program has outgrown three shelves. It cedes the value crown to stated-capacity rivals but nothing beats its general-industry capacity.

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Who the UniShield 4-Shelf Metal Cabinet is for

• Plants, fabrication shops, and warehouses whose hazard profile calls for Class B breadth and depth
• Programs that stock beyond the ANSI minimum — burn modules, eye care, OTC medications — and need shelf space for all of it
• Facilities consolidating scattered kits into one central, auditable station backed by satellite units from the workplace first aid kits collection
• Compliance-driven buyers mapping stations to OSHA 29 CFR 1910.151 — the classification groundwork lives in our OSHA first aid kit requirements explained reference

What the UniShield 4-Shelf Metal Cabinet does well

The fourth shelf changes what the station can be

Three-shelf cabinets hold a Class B fill; a fourth shelf holds a program. In practice the extra row becomes the home for whatever your site consumes beyond the baseline — burn dressings for hot work, extra gloves, eye care, or the OTC medications a mature program adds. Every 3-shelf rival in our lineup eventually forces a choice between the baseline fill and the extras; this cabinet doesn't.

Class B scope where it belongs

The listing designates an ANSI Class B fill for high-risk industrial sites — the environment Z308.1's Class B was written for: bigger crews, mechanical hazards, longer distances to care. If your risk assessment lands on Class B (our OSHA first aid kit requirements reference walks the logic), this station arrives on the right side of the line.

Standard metal station format, done at scale

The swing-door metal wall cabinet is the format maintenance crews recognize on sight, and this is the biggest general-industry expression of it we carry. Mounted at eye level in a corridor or tool crib, it satisfies OSHA's "readily available" expectation while keeping four labeled shelf rows visible the moment the door opens.

One-brand restocking

UniShield's own UniShield Class B Refill with Medications maps straight onto this cabinet's fill, which keeps the quarterly restock to a single line item. The multi-brand first aid kit refills collection covers everything the brand pack doesn't.

The value pick within the 4-shelf tier

Among 4-shelf stations we stock, this is the affordable one: $189.95 against $239.95 for the restaurant-fill version of the same chassis. Unless you need detectable dressings and a burn shelf, this is the 4-shelf to buy.

Where the UniShield 4-Shelf Metal Cabinet falls short

No stated headcount rating

The listing gives no person rating, which complicates the paperwork for buyers who want a documented sizing basis. The First Aid Only 90575 cabinet states 100-150 person coverage for $46 less — if the number on the spec sheet matters more than the fourth shelf, that is the better buy.

Priced above the stated-capacity 3-shelf rivals

Both the First Aid Only 90575 ($143.87) and the EVERLIT CARE 203SFAK100 ($138.95) undercut it while stating B+ fills and person ratings. You are paying roughly $50 for shelf capacity — worth it only if you'll use it.

Oversized for low-risk sites

An office or small studio doesn't need four shelves of Class B supplies. The UniShield 3-Shelf Metal Cabinet with its Class A fill is the same brand scaled to that reality, for $40 less.

UniShield 4-Shelf Metal Cabinet vs the competitive set

All seven wall cabinets in our first aid kits parent collection compared on the axes that decide a station purchase:

Check prices on Amazon → UniShield 4-Shelf Metal First Aid Only 90575 MFASCO Class B

Within the UniShield series — metal 4-shelf vs restaurant vs 3-shelf Class A

The three UniShield cabinets share metal wall-mount construction; fill and shelf count are the levers. Deep dives on the siblings: UniShield Restaurant Cabinet review and UniShield 3-Shelf Class A review.

• Buy the Metal 4-Shelf for general industry that needs maximum capacity and Class B scope — the default UniShield.
• Buy the Restaurant 4-Shelf only when food service or food production describes the site.
• Buy the Metal 3-Shelf Class A for offices and documented low-risk environments.

Shop the UniShield series on Amazon → Metal 4-Shelf Class B Restaurant 4-Shelf Metal 3-Shelf Class A

Refills and companion coverage — the fourth shelf earns its keep

Cabinets are restocked, not replaced, and this one restocks cleanly: the UniShield Class B Refill with Medications is the matching brand pack, the Urgent First Aid Class B Refill, 50 Person is the strong multi-brand alternative, and the first aid kit refills collection holds the rest. Facilities using the fourth shelf for burn or eye coverage should stock it from the burn care collection and consider a wall-mounted eyewash beside the cabinet — the PhysiciansCare Wall-Mount Eyewash Station is the natural pairing where splash hazards exist.

Top refills on Amazon → UniShield Class B Refill Urgent First Aid Class B Refill

Where the 4-shelf format sits in the category

The cabinet market is mostly 3-shelf stations; 4-shelf units are the step-up tier for programs that treat first aid as more than a checkbox. The trade is straightforward — roughly $40-50 over comparable 3-shelf stations for a shelf of growth room. Facilities with mobile crews should remember a fixed station only covers the building it hangs in; pair it with portable units via the best workplace first aid kits guide, and let the which first aid kit do you need guide arbitrate formats. Class selection — A or B — should follow the hazard logic in the OSHA first aid kit requirements reference.

Total cost of ownership

$189.95 once, then consumables. A Class B station serving an industrial crew typically wants a quarterly refill cycle plus ad-hoc top-ups of gloves, bandages, and dressings from the bandages and wound care collection. The fourth shelf actually helps the budget here: buying consumables in larger boxes is cheaper per unit, and this cabinet has somewhere to put them. Amortized over five years the chassis costs about $38 a year — monthly shelf audits, logged on the door, are what keep the investment honest.

Final verdict: 4.5/5

The UniShield 4-Shelf Metal Cabinet is the station we recommend when the question is "will we outgrow it?" — nothing else in our general-industry lineup offers the same room. It loses half a point for the missing headcount rating and the premium over stated-capacity 3-shelf rivals. If a documented person rating drives your purchase, buy the First Aid Only 90575 3-shelf cabinet; if capacity and growth room drive it, buy this.

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UniShield 4-Shelf Metal Cabinet — frequently asked questions

Is the UniShield 4-Shelf Metal Cabinet ANSI Class B?

Yes — the listing designates an ANSI Class B fill for high-risk industrial sites. Class B is the Z308.1 tier for larger workforces and higher-hazard environments; the OSHA first aid kit requirements guide explains how the classes are defined and when each applies.

How many employees does the UniShield 4-Shelf Metal Cabinet serve?

The listing does not state a person rating. Its 4-shelf Class B capacity physically exceeds most 100-person 3-shelf stations, but buyers who need a documented number should compare the First Aid Only 90575, which states 100-150 person coverage.

UniShield 4-Shelf Metal vs First Aid Only 90575 — which should I buy?

Buy the UniShield for maximum shelf space and program growth room; buy the First Aid Only 90575 for a stated 100-150 person rating at $46 less. Our First Aid Only 90575 review makes the case for the capacity-rated route.

UniShield 4-Shelf Metal vs UniShield Restaurant — what is the difference?

Same 4-shelf Class B chassis; the restaurant version swaps in blue detectable bandages and burn care for food service and costs $50 more. Unless food touches your operation, this metal version is the right buy — the UniShield Restaurant Cabinet review covers the kitchen case.

Is a 4-shelf first aid cabinet worth it over a 3-shelf?

If your program stocks anything beyond the ANSI baseline — burn modules, eye care, medications, bulk gloves — yes: the fourth shelf is where those live without crowding the core fill. If you only ever stock the baseline, a 3-shelf like the EVERLIT CARE 203SFAK100 saves about $50.

Does the UniShield 4-Shelf Metal Cabinet meet OSHA requirements?

OSHA 29 CFR 1910.151 requires adequate, readily available supplies rather than certifying cabinets; a stocked Class B station is a strong foundation for that showing. Document the sizing logic per the OSHA first aid requirements reference.

How do I restock the UniShield 4-Shelf Metal Cabinet?

Use the matching UniShield Class B refill for one-order resets, or mix from the refills collection once you know which items your site actually consumes. Cabinets are refilled, never replaced.

Where should the UniShield 4-Shelf Metal Cabinet be mounted?

On a stud- or masonry-anchored wall in a high-traffic corridor, tool crib entrance, or break area — somewhere every shift passes and no key is required. A loaded 4-shelf metal cabinet is heavy; do not hang it on drywall anchors alone.

Is the UniShield 4-Shelf Metal Cabinet good for a warehouse?

Yes — warehouses are exactly the high-risk, high-headcount environment the Class B fill targets, and the capacity handles multi-shift consumption. Add satellite kits from the workplace first aid kits range so far corners of the building stay within a short walk of supplies.

Can I use the UniShield 4-Shelf Metal Cabinet on a construction site?

For fixed site offices and long-duration projects, yes — construction first aid falls under OSHA 1926.50, covered in the same OSHA first aid reference. Rotating crews and short jobs are better served by portable kits from the best workplace first aid kits guide.

What goes on the fourth shelf?

Whatever your incident log says you consume beyond the baseline: burn dressings from the burn care range, eye care, bulk gloves, or OTC medications where your program allows them. The extra shelf exists so the growth items don't bury the core fill.

Does the UniShield 4-Shelf Metal Cabinet come with everything stocked?

The listing describes it as arriving with an ANSI Class B fill but does not publish an itemized manifest, so verify shelf contents on arrival against a Z308.1 checklist before signing off the station as in service.

How often should I audit a 4-shelf first aid station?

Monthly at minimum for industrial sites, plus a restock after any notable incident. Log audits on a dated checklist on the cabinet door — it is the simplest record that survives an OSHA conversation.

Should I add an eyewash station next to the cabinet?

If chemical splash or airborne-particle hazards exist, yes — a first aid cabinet does not satisfy emergency eyewash expectations. Browse the eyewash stations collection; wall units mount directly beside a cabinet to create one first aid point.

Is the UniShield 4-Shelf Metal Cabinet the best first aid cabinet we stock?

It is the best for capacity, and our pick for growing industrial programs. The best first aid cabinets ranked guide puts it in context against the stated-capacity and budget picks — "best" tracks whether shelf space or paperwork drives your decision.