3M E-A-Rsoft 311-4106 Metal Detectable Corded Earplugs, 33dB NRR,Tapered, Polyurethane, Blue
3M E-A-Rsoft Earplug, Blue Cord, Corded/Without Cord: Corded, Metal Detectable: Yes, 33dB Noise Reduction Rating, Yellow Plug, 200 Pairs Per Package, Polyurethane Plug, Tapered, Size: Regular, Standards: ANSI S3.19-1974
- Implanted stainless steel ball bearing in the earplug and metal particles in the cord
- Poly bag keeps each pair of earplugs clean before use
- Regular size fits most earcanals
- Noise Reduction Rating (NRR) 32dB, CSA class AL
- Test compatible with 3M E-A-Rfit validation system. The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is leading the advancement of hearing conservation