Panel Mounting Pressure Gauge 1)Dial: 1.5", 2", 2.5 ... : 1/8" 1/4" 1/2" 3)CE Certificate Panel Mounting Pressure Gauge 4Z2U are high quality dry gauges design ... ring (or bayonet threaded ring), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ,SS and so on ... % accuracy, recalibrators,restrictors, special connections and more. Crimped Ring Panel Mounting Pressure Gauge 4Z2U