The OEM 3M TaperFit Uncorded Earplugs MMM3121219 provide effective hearing protection with a Noise Reduction Rating (NRR) of 32 dB, classified as CSA Class AL. Each pair is kept clean and ready for use in a poly bag. Made from soft polyurethane foam, these earplugs ensure a low-pressure, comfortable seal for prolonged wear. They are also test compatible with the 3M E-A-Rfit Validation System.