H7B 3M PELTOR OPTIME Description Description For noise levels up to 101 dBA Stainless steel band distributes weight for low-pressure fit Liquid/foam filled earmuff cushions Noise Reduction Rating (NRRA)*: 26 dB. CSA Class A Related products 3M7500 SERIES HALF MASK RESPIRATOR 3M3939 Heavy Duty Duct Tape QB2HYG – Honeywell Howard Leight Quiet® Polypropylene Foam Banded Earplugs H6B/V , Optime™ 95 Behind-the-Head Earmuffs H6B/V