Feature●?[ Advantage ] 2 Pieces heavy duty technical scuba diving 50lbs lift bag designed with reflective stripe, high visibility, lightweight, compact and durable●?[ Wide Usage ] Perfect for salvage projects and also can be used as a marking buoy for decompression or safety stops in the●?[ ] With over pressure valve to rapidly remove air when needed and accidental over-inflation during ascent from expansion, With loop handle , with stainless steel D- and lifting strap at bottom for slate attachment●?[ Occasion ] Great gear equipment accessories for every open diver, scuba diving, snorkeling●?[ Stable ] Special design means more air to keep the lift bag stable in the waterDescription