... Pressure Gauge For general use, black steel case, plastic rotating window, brass internal and connection. Product Name: ... (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 ... acceptedOuter Packing:Cartons, packed in PVC belt