Ningbo Runkey CGA cylinders Co., Ltd. is one of the most professional manufacturers for Gas Cylinder in China. We supply Refillable Steel Cylinder for Refrigerant, supply and design Steel Cylinder for Mapp gas, Propane, Refrigerant etc., annual production is more than 1 million cylinders. We have CE Certificate for Refillable Steel Cylinder, CE & TPED Certificate for Steel Cylinder for Mapp gas, Propane, and large quantity of cylinders have been sold to EU countries.