... gas flowmeter 2,measure and control flow rate 3.various flowmeter Portable glass flow meter for air, oxygen, hydrogen 1 ... in stock: 0.5-8LPM,1-12LPM,2-20LPM ,3-30LPM,10-60LPM,etc.Specifications for other models: ModelMeasure ... NT-4T,6T,8TFlow Meter With value Value Fitting Float O-ring T- with O- No Brass Ss 1 ... PTFE 1-Silicon rubber 2-Fluorin rubber 3-Butyl glass flow meter for air, oxygen, hydrogen