3M Ear Muff Model H10A NRR30 Features : 0 Special version, double cover, NRR noise reduction: 30 dB 0 suitable for use. Reduce noise in noisy areas with an average of 105 decibels 0 Large ear cups made of ABS plastic with stainless steel strap 0 Strong, lightweight, comfortable to wear. Add a sponge for a better fit. 0 Adjustable headband. with 2 attachment points attached to the ear cup To distribute the weight, reduce pressure. 0 Excellent noise reduction 0 Designed to be comfortable even when worn for a long time. Packing size : 1 piece / box SKU: EARS0003 Category: Ear Protection