... 1)Dial: 1.5", 2", 2.5", 3", 3.5", 4", 6" 2)Connection size: 1/8" ... corrosive to the typical applications include pumps,compressors, pool filters as well as commercial and industrial equipments. ... bezel, chrome plated bezel, brass bezel, steelroll ring (or bayonet threaded ring), type: snap on, roll ringTUBE&SOCKET: steel ... lens are availableACCURACY:ASME B40.1 Grade B (3-2-3%)ASME B40.1 Grade A (2-1-2 ...