... 8" 1/4" 1/2" 3)CE Certificate U Clamp Pressure Gauge are high quality dry gauges design ... all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, steel bezel, ... all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL:Steel black bezel, steel bezel, ... ,restrictors, special connections and more. Back Connection U Clamp Pressure Gauge 4Z2U