Ear Plug Dispenser Refill Product Type Dispenser Refill Noise Reduction Rating 33 dB Insertion Method Roll-Down Reusability Disposable Earplug Shape Bell Earplug Pair Pack Type Loose Earplug Size M Pairs per Package 500 Earplug Color Coral Metal Detectable No Refill Type Bulk Refill Cord Options Uncorded Earplug Material Foam Standards ANSI S3.19-1974 EU EN 352-2 2002 OSHA CFR 1910.95 Compatible Grainger Part Number 3WU31 Compatible with Manufacturer Model Number LS-500