3M 90565-4DC-PS Pro-Grade Earmuff with Adjustable Headband, 30db NRR HALLOWEEN Input frequency: 60 hertz

Input frequency: 60 hertz

Durable construction materials are now stronger than ever allowing you to work faster with less effort

and high resistance to shock loads

Embossed bottom for increased strength

Fits all standard size deep frame

3M 90565-4DC-PS Pro-Grade Earmuff with Adjustable Headband, 30db NRR HALLOWEEN Input frequency: 60 hertz3M Pro Grade Earmuff offers superior comfort and protection. Designed to be a high noise reducing protection earmuff. Adjustable, vented headband design reduces heat build and improves comfort when worn with hats. Great for yard work and household projects where harmful noise is present. One of the best noise reducing earmuffs Noise Reduction Rating (NRR) of 30 dB Helps protect against harmful noises that are at 85 dB and above Steel wire headband