... 4" 1/2" 3)CE Certificate U Clamp Pressure Gauge are high quality dry gauges design to provide reliableservice ... flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, steel bezel, chrome plated bezel, brass bezel, steelroll ring (or bayonet threaded ... flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, steel bezel, chrome plated bezel, brass bezel, steelroll ring (or bayonet ...