3M™ E-A-R™ Earmuffs 331-4000, Model 4000 20 EA/Case
Outstanding comfort and protection at a budget-conscious price.
∙ Vertical adjustment system for quick and easy fitting.
∙ Large earcup openings to fit most ear sizes.
∙ Soft, wide cushions for even pressure and extra comfort.
∙ Noise Reduction Rating (NRR)* 27 dB. CSA Class A.
*The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.
3M is Leading the Advancement of Hearing Conservation™."