3M E-A-Rsoft Yellow Blasts Earplugs - 200 Pairs, 32dB, Model Number 312-1219 3M E-A-Rsoft Yellow Blasts are the softest, smoothest, highest NRR earplugs. Expands slowly to fit virtually any ear canal. 200 pair per box. NRR 32dB. Noise Reduction Rating (NRR) (dB): 32, Disposable: Yes, AM/FM Radio: No, Pairs (qty.): 200, Hearing Protector Type: Earplugs, Case Included: No, Battery Required: No Features Sold as 200/Pair. Excellent attenuation. Shaped for increased comfort. Noise Reduction Rating (NRR)*: 33 dB. CSA Class AL. Test compatible with 3MTM E-A-RfitTM Validation System. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.