Howard Leight Single-Use FirmFit Cylinder Shaped Foam Corded Earplugs of one size fits all and can be easily inserted. Earplugs featuring slow recovery rate to give plenty of time to correctly insert in ear canal requires less pressure to roll down. Earplugs that exert 29% less expANSIon pressure on the ear canal has distinct warning orange color to make earplugs easily visible. TPE foam earplugs that are 40% softer lets you feel the softness when held in hand. NRR 30 dB earplugs render excellent protection in most medium-to-high noise environments. Earplugs can be ideally used in agriculture industries, construction industries, fire protection industries, forestry industries, government industries, law enforcement industries, manufacturing industries, mining industries, steel and metals industries, transportation industries, utilities industries and welding industries. Earplugs meet the requirements of ANSI S3.19-1974 standard and are sold as 100 pairs per box.