... flowmeter 2.nice looking,light weight 3.durable performance and long life 4.high quality polymethyl methacrylate Summary:This ... is mainly made by acrylic glass,widely used for oxygen measuring,control oxygen flow.Featured with nice figure,light weight,unbreakable, ... the professional manufacturer of flowmeters,thermometers,liquid level meters,transmitters and so on.The main products are contain of LZB/ ...