3M E-A-R Pistonz corded earplugs soft foam tips conform to the unique shape of each earcanal to create a comfortable noise-blocking seal. Since there is no need to roll these earplugs down before use, fitting is easy and the foam tips stay clean, even when your hands are dirty. Push-to-fit products provide in-ear comfort and convenience, with the hearing protection you expect from 3M. Instant-use - No need to roll down. Stem is stiff enough for insertion, yet designed to flex sideways if impacted. Metallic-style earplug tips with ultra-soft feel for all day wear. Officially licensed hearing protection of NASCAR. Noise Reduction Rating (NRR): 29 dB. CSA Class Class AL. The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50 percent for estimating the amount of noise reduction provided.3M is Leading the Advancement of Hearing Conservation. Color: Silver. Cord type: Vinyl. Dielectric: Yes. Hearing protection style: Push-to-fit. Material: Polyurethane. Noise reduction rating: 29 Decibel. Packaging: Poly bag. Product type: Earplugs. Recommended application: Chipping, chiseling, drilling, furnace operations, grinding, heavy equipment operations, machining, pouring/casting, power fastening, riveting, sanding, sawing, welding. Recommended industry: Agriculture, automotive, chemicals, construction, general manufacturing, healthcare, oil and gas, pharmaceuticals. Shape: Push-to-fit foam. Size: One size fits most.