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