... Name:Pressure Gauge For general use, black steel case, plastic rotating window, brass internal and connection. Product Name:stainless ... bspt (zg, pt)4) Case material: black steel, plastic, chrome plated steel, stainless steel,iron5) Material of connection ... 2% - 3% , ±2.5%8)Lip Material: Plastic, plastic dial face, glass dial face9)Bourdon Tube: brass, phosphor bronze, stainless steelInner Packing: ...