Manufacturer Name: Ishigro Co., Ltd. Features: Generally used to stop fluid in plumbing pipes. [Uses] For stopping fluid in piping. Specifications: Nominal Diameter (A): 1.6 inches (40 mm), Outer Diameter (in.): 4.7 inches (120 mm), Thickness (in.): 0.4 inches (12 mm), Number of Bolt Holes: 1.9 inches (48.60 mm), Working Pressure (K): 1 JIS B2220 Standards, Working Pressure: 5K (Material/Finish) Steel (Equivalent to SS400000) Note: Rust resistant. Varnish (yellow) is applied, but rust may occur.