* Molded from super tough, lightweight glass filled Nylon (not brittle PVC). * Zero maintenance required. Simply insert a PLB and forget about it. * Will not corrode. Try opening an aluminium canister when the threads have corroded. * Unique locking ring design makes opening extremely easy. Requires NO FORCE.. * Very compact. Will fit in most BCD pockets or tech utility pouches. * Two sizes to fit different sized PLBs. * 70m depth rating. * Topside carry pouch included.