... 1/4" 1/2" 3)CE Certificate U Clamp Pressure Gauge are high quality dry gauges design to ... polished case, all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, ... ), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ,SS and so on. ... case, all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, ...