The 3M E-A-R UltraFit Reusable Corded Earplugs, Model 340-4004, feature a patented triple-flange design for a secure, comfortable fit across varied ear canal sizes. With a stem-based insertion system, they minimize contact with ear tips, enhancing hygiene. Crafted from soft, washable elastomeric polymer, these corded earplugs are reusable, cost-effective, and compatible with the E-ARfit Validation System for personal attenuation testing. Offering an NRR of 25 dB and CSA Class AL protection, they deliver reliable hearing safety in industrial environments. Key Features: Stem helps users insert earplug into their ear canals; Compatible with the 3M E-A-Rfit Validation System; No need to touch the ear tips during earplug insertion, helping to keep ear tips clean longer; Noise reduction rating (NRR): 25 dB for standard Ultrafit and 27 dB for Ultrafit 27; Vinyl or cloth material options for cords; Soft polymer is washable and reusable; CSA Class AL. Industries & Applications: Ideal for various industrial contexts where workers face moderate to high noise exposure and benefit from reusable hearing protection: Manufacturing, Construction, Heavy Engineering, Woodworking; Automotive plants, Chemical and Pharmaceutical facilities; Maintenance, General Industry, Warehousing.