... rotating window, brass internal and connection. Product Name:Pressure Gauge1) Dial size: 1.5, 2, 2.5, 3, 3.5, 4 ... % - 2% - 3% , ±2.5%8)Lip Material: Plastic, plastic dial face, glass dial face9)Bourdon Tube: brass, phosphor bronze, stainless steelInner Packing ... acceptedOuter Packing:Cartons, packed in PVC belt stainless steel & glass dial face Pressure Gauge