CNG LPG cylinder vavle is to help nozzle filling gas into cylinder. We are a manufacture which is professionally supply all kinds ... for cars, our products include CNG Cylinder, CNG valve, CNG conversion kits, CNG Reducer, CNG valve filling, High pressure tube, CNG pressure ... sensor/gauge, gas change valve, CNG mixer, Diaphragm, , Back-fire device, Table tee jointed, ...