... is mainly made by acrylic glass,widely used for oxygen measuring,control oxygen flow.Featured with nice figure,light weight,unbreakable,long life.Customized ... of LZB/LZJ(-F)glass tube flow meter,LZB-W(B)micro type glass tube flow meters,G.R.F10/20/30 ... and five hundred kinds products. customized good transparent arcylic flow meter,oxygen flowmeter,gas flowmeter,acrylic rotameter,chemical rotameter