Size:NO.8 (8TZN CR airtight zipper) Teeth material: cupronickel Tape material: Chloroprene rubber (CR) Neoprene zipper length: 100CM (according to customers????????????????? requirements) close end ????????????????? Zipper specifications: Width of zipper teeth: 7.0 MM Total width of zipper: 70.0 MM Pulling intension of zipper: ?????????????????380 N/IN Strength of the top stop: ?????????????????350 N Strength of the bottom stop: ?????????????????350 N Airtight: ?????????????????100 KPA Dive depth: ?????????????????10 M Airtight after 200 times reciprocation: ?????????????????90 KPA Dive depth after 200 times reciprprocation: ?????????????????9M Chain smooth: <55 N Smooth of top and bottom stop: <75 N Work temperature: ????????????????? -30?????????????????-65????????????????? Chemistry resist Work safely after 24 hours deep in 93# gas