3M™ - 무선 폼 귀마개; 청력 보호 1100 (10쌍; 20개)

Smooth, dirt resistant surface for hygieneComfortable for a wide range of earcanal sizesTest compatible with 3M™ E-A-Rfit™ Validation SystemNoise Reduction Rating (NRR)*: 29 dB. CSA Class AL