Moldex 6615 SparkPlugs Metal Detectable Corded Foam Earplugs — NRR 33

Moldex 6615 SparkPlugs Overview

The Moldex 6615 SparkPlugs is a single-use NRR 33 foam earplug in which both the plug and the cord are metal-detectable, so a lost plug can be caught by inline metal detection before it reaches finished product. It is the hearing-protection answer for food, beverage, and pharmaceutical lines that run a HACCP foreign-material program and still need the maximum in-ear rating. Browse the full range in metal-detectable ear plugs and food-safe ear plugs, or see top picks in our best metal-detectable ear plugs guide.

Where the SparkPlugs Fits in Hearing-Protection Selection

This SKU is selected by a requirement, not just a noise level: if your facility's foreign-material control plan mandates detectable PPE, a standard foam plug is disqualified regardless of its NRR. The 6615 satisfies both needs at once — NRR 33 attenuation and full detectability. Confirm the noise exposure against the OSHA action level using what NRR means and how to derate it and the program requirements in OSHA 29 CFR 1910.95 hearing conservation.

Who Should Buy the Moldex 6615 SparkPlugs?

• Buy it if your HACCP or foreign-material program requires metal-detectable PPE on the line.
• Buy it if you need maximum NRR 33 protection in a corded, detectable plug.
• Choose non-detectable instead outside the production zone — the 6800 Pura-Fit is cheaper at the same NRR.
• Choose reusable instead if plugs are reinserted constantly — see washable reusable ear plugs.
• Stock a dispenser to keep detectable plugs controlled at line entry — see ear plug dispensers.

What Does the SparkPlugs Protect Against?

What the SparkPlugs Does NOT Protect Against

• It does not replace your metal-detection or X-ray equipment — it makes a dropped plug catchable, not invisible-risk-free.
• It is single-use, not washable.
• It does not provide situational awareness or communication.

Important: A foam earplug only delivers its rated NRR when rolled down tightly and inserted deeply enough to expand in the canal. OSHA and NIOSH recommend derating the labeled NRR in the field. Detectability supports your HACCP plan but does not substitute for correct fit, training, and exposure verification.

Best Applications

Food & beverage processing

The core use case: detectable PPE on packaging and processing lines. Pair with the full food-safe ear plugs range and detectable metal-detectable ear plugs.

Pharmaceutical & clean manufacturing

Where foreign-material control is audited, the 6615 keeps hearing protection compliant. Compare top detectable options in the best metal-detectable ear plugs guide.

High-noise lines needing max NRR

At NRR 33 the 6615 is among the highest-NRR ear plugs while remaining detectable.

Compatible Moldex SparkPlugs Dispensers

Keep detectable plugs controlled at line entry with a SparkPlugs station — corded variants for the 6615.

SparkPlugs vs Other Moldex Foam Earplugs

SparkPlugs vs Pura-Fit

Same NRR 33 foam comfort; the difference is detectability. Buy the 6615 SparkPlugs when a foreign-material program requires detectable PPE; buy the 6800 Pura-Fit everywhere detectability is not required, because it costs less. Verdict: let the food-safety plan decide — detectability is the only reason to pay the premium.

SparkPlugs vs Disposable vs Reusable

In food plants, single-use foam is usually preferred for hygiene, but heavy reinsertion can favor washable plugs. Weigh the trade-off in disposable vs reusable ear plugs. Verdict: for most detectable-PPE lines, the single-use 6615 is the cleaner, audit-friendly choice.

SparkPlugs Quick Answers

Are Moldex SparkPlugs metal-detectable?

Yes — both the foam plug and the cord are detectable, so a lost plug can be caught by inline metal detection.

What is the NRR of the 6615?

NRR 33 — the maximum in-ear rating, the same as the Pura-Fit.

Is the cord detectable too?

Yes — the cord is detectable as well as the plug, which is required for true line compliance.

Are they reusable?

No — single-use; for washable plugs choose a flanged reusable.

Which dispenser fits the 6615?

Corded SparkPlugs stations such as the 6880 PlugStation Corded and the 6881 metal-detectable PlugStation.

Moldex 6615 SparkPlugs Specifications

Helpful Buying Guides

• Best metal-detectable ear plugs
• Best foam ear plugs (2026)
• Highest-NRR ear plugs
• Disposable vs reusable ear plugs
• What is NRR (Noise Reduction Rating)?
• OSHA 29 CFR 1910.95 hearing conservation

Moldex 6615 SparkPlugs Frequently Asked Questions

How much do Moldex 6615 SparkPlugs cost?

WC Safety lists the 6615 at $24.93 per box.

Why do food plants require metal-detectable earplugs?

Foreign-material control plans require that any PPE which could fall into product be catchable by inline metal detection, so a lost plug is intercepted before shipment.

Do the SparkPlugs meet HACCP requirements?

They are designed for HACCP foreign-material programs; both plug and cord are detectable. Your facility's plan defines the specific acceptance criteria.

Is detectability different from being food-safe?

Yes — detectability means inline detectors can find a lost plug; it is one element of a food-safety program, not a coating or food-contact rating.

Are the 6615 latex-free?

Yes — they are polyurethane foam with no latex.

Can I use SparkPlugs outside the food line?

You can, but detectability adds cost with no benefit away from production; a standard Pura-Fit is cheaper for general areas.

Why corded for food lines?

The cord keeps the pair together and reduces the chance of a single plug being lost into product; detectability is the backstop.

How do I insert them correctly?

Roll the foam into a thin crease-free cylinder, pull the ear up and back, insert past the canal opening, and hold 20–30 seconds while it expands.

Are these OSHA compliant for noise?

OSHA does not approve individual plugs; the NRR 33 6615 can anchor a compliant 29 CFR 1910.95 program when fitted correctly for the exposure.

Do you stock matching dispensers?

Yes — corded SparkPlugs PlugStation (6880) and the metal-detectable PlugStation (6881).

Is there an uncorded SparkPlugs version?

Yes, Moldex offers uncorded SparkPlugs; the 6615 is the corded detectable variant for retention on the line.

How many should I buy for a line?

Plan one pair per worker per shift and stock a dispenser at line entry to control issue and usage.