... case, plastic rotating window, brass internal and connection. Product Name:iron case with chrome plated Pressure Gauge 1) Dial ... black steel, plastic, chrome plated steel, stainless steel,iron5) Material of connection and internal: brass, chrome plated brass, stainless steel6) Scale: ... plastic dial face, glass dial face9)Bourdon Tube: brass, phosphor bronze, stainless steelInner Packing:Paper box, ...