Nugent Liquid Sight Flow Indicators permit observation of flow and clarity of liquid through a pipe. Windows are both sides allow easy viewing. Two styles are available: Series 1366E and Series 1366G. 1366E has a stainless-steel spring-loaded indicator vane that moves in proportion to the flow. This style is especially suited for observing variations in flow rates. 1366G is supplied without the indicator vane. Available in brass and in sized from 3/8" to 2" NPT.