Surewerx S23409 Cap Mounted Ear Muff HPS428 Premium Cap Mounted Ear Muff Designed to mount on to most brands of slotted hard hats Cup pads are soft and comfortable – ideal for extended use Strong stainless steel wire swivel fork arms ensure strength & durability Easily adjustable for quick and convenient positioning One of the highest NRR ratings for a cap mounted muff (28 dB) Independently tested/certified to NRR 28 (ANSI S3.19) CSA Class A

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