Product Name: High Performance Alluminum Quick Coupling Fire Hose Couplings Model NO.: choke plug with chain Standard: Standard Material: Alloy Flexible or Rigid: Flexible Structure: Universal Connection: Flange Size: From Dn40 (1-1/2") to Dn100(4") Trademark: OEM Transport Package: Carton, Pallet Specification: ALL SIZES Origin: China Product Description High Performance Alluminum Quick Coupling Fire Hose CouplingsSpecification:Standard: EN 14420-8/NF E29-572Casting Method: Gravity Casting or Precision CastingSize: From DN40 (1-1/2") to DN100(4")Material: Alumiunium A356-T6 (Heat Treated), Staintless Steel 316, Brass and PPSeal: NBR, EPDM, FPM, PTFEThread: BSPSurface Treatment: Polishing or Sand-BlastWorking Pressure: 16bar/230psiTest Pressure: 30bar/435psiMinimum Blast Pressure: 50bar/725psiSizePart Number3"DN80AL 687804"DN100AL 687100