1.valve type flowmeter 2.nice looking,light weight 3.durable performance and long ... methacrylate Summary:This series flowmeter is mainly made by acrylic glass,widely used for oxygen measuring,control oxygen flow.Featured with nice figure,light ... .50.2~20.3~30.5~51~10Company ProfileCHANGZHOU CHENGFENG FLOWMETER CO.,LTD was established in 1979,our company is the ...