The 3M Yellow Un-corded Earplugs, seal the ear canal with soft, slow-recovery foam for excellent noise reduction and reliable hearing protection. The tapered earplugs are easy to roll down and insert, then expand within the ear canal for a comfortable, secure fit. Earplugs come in a poly bag to keep them clean prior to use. Recommended applications include assembly and mechanical, chipping, chiseling, cleaning, drilling, furnace operations, grinding, heavy equipment operations, machining, metal repair, painting, pouring/casting, power fastening, riveting, sanding, sawing and welding. These earplugs are commonly used in the following industries: agriculture, automotive, chemicals, construction, general manufacturing, healthcare, oil and gas, and pharmaceuticals. These earplugs have a Noise Reduction Rating (NRR) of 33 dB. Earplugs are made of a polyurethane. Test compatible with 3M E-A-Rfit Validation System. The NRR may overestimate the hearing protection provided during typical use...