... survial suits, liquid container , immersion suits ; waterproof zipper for immersion suit 1.Usage: Immersion suit zip8TZN airtight/wateproof zippers ... used for life jacket,dry suit, survial suits, liquid container , ... material: cupronickel;Tape material: Chloroprene rubber (CR), used for dry bagSize:NO.8 (8TZN CR airtight zipper)Teeth material ...