Rockets Reusable Earplugs, TPE, Purple, Uncorded ORS NASCO MRI non magnetic ball pein hammer MRI non magnetic ball pein hammer helps protect employees and MRI equipment during maintenance and repair work For use in locations where flammable or combustible vapors 000 operations indicating a service life of 10 to 12 years of comparable use Non interchangeable oxygen and fuel gas connectors prevent accidental gas mixing Instant closure on reverse flow check valves with total shutoff at only 10 oz of back pressure slips easily into pocket Washable and reusable Easy grip handle Air bubble in the tip provides cushioned comfort Easy insertion in any size ear canal Pocket Pak® carrying case for plug storage