... brass bezel, steelroll ring (or bayonet threaded ring), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ... high quality dry gauges design to provide reliableservice on applications not corrosive to the typical applications include pumps ... brass bezel, steelroll ring (or bayonet threaded ring), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ...