... case, plastic rotating window, brass internal and connection. Product Name:stainless steel & glass dial face Pressure Gauge 1) Dial size: 1.5, 2 ... , 2.5, 3, 3.5, 4,62) Connection size: 1/8, 1 ... steel, plastic, chrome plated steel, stainless steel,iron5) Material of connection and internal: brass, chrome plated brass, stainless steel6) Scale: single ...