... window, brass internal and connection. Product Name:iron case Pressure Gauge 1) Dial size: 1.5 ... pf), bspt (zg, pt)4) Case material: black steel, plastic, chrome plated steel, stainless steel, ... iron5) Material of connection and internal: brass, chrome plated ... % - 2% - 3% , ±2.5%8)Lip Material: Plastic, plastic dial face, glass dial face9)Bourdon Tube: ...