Earplugs are a form of hearing protective devices that are inserted into the ear canal to protect wearers from loud noises, cold weather and also particles from entering the ears. They prevent hearing loss and ringing of the ears (tinnitus). In order for earplugs to work efficiently, the right size must be used and be properly inserted into the ear canal. The four main types of hearing protection earplugs are foam earplugs, wax earplugs, flanged earplugs and custom-molded earplugs. Foam earplugs are often made of PU (polyurethane) or PVC (polyvinyl chloride) material which compresses as it is inserted into the ear canal and expand for a perfect fit. Wax earplugs roll into a molded ball which fits into the external part of the canal, while flanged silicone earplugs are designed for universal fitting. Custom-made earplugs are designed to fit all shapes of ear canals. They are made from the wearer's earmolds and are further classified into formed-in-place and laboratory-made custom-mold earplugs.Let MRO Supply be your single source convenience for all industrial products including supplies, tools and equipment. We strive to the leading supplier of high quality tools, supplies and equipment to offer our customers lasting solutions sourced from the best manufacturers in the industrial arena. Talk to us today to keep your manufacturing plant up and running.