1.valve type flowmeter 2.nice looking,light weight 3.durable performance and long life 4.high quality polymethyl methacrylate Summary:This series flowmeter is mainly made by acrylic glass,widely used for oxygen measuring,control oxygen flow.Featured with nice figure,light weight,unbreakable,long life.Customized details will be differenct: ModelMeasuring Range L/minConnection TypeAccuracy ...