Features Bell-shaped ear plugs have a flared end that provides extra coverage at the edge of the ear canal. The flare also provides a gripping point to aid insertion and removal of the plug. Noise Reduction Rating / 33 dB Earplug Shape / Bell Insertion Method / Roll-Down Reusability / Disposable Cord Options / Uncorded Earplug Size / M Earplug Material / Foam Earplug Packaging / Bulk Box Earplug Pair Pack Type / Plastic Bag Series / E-A-Rsoft(TM) FX(TM) Standards / ANSI/ASA S12.71-2018 Pairs per Package / 200 Earplug Color / Yellow Metal Detectable / No