Cylinder caps size: W80-11, W3-1/2 X 8 W95-11, W3-1/2 X11 Surface: Galvanized Product information DescriptionOxygen cylinder capMaterialSPHCThread sizeW80 X 11Total length155mmOut diameter88mm+0.00/-0.3mmWeight0.95kgSurfacegalvanizedPacking24pcs/ctn, 19200pcs/20ft containerProduct pictures with Hex nut on the topPacking mode: 24pcs/ctn Cylinder cap Cylinder cap