[Premium Material]Empty refillable cylinder is made from 304 stainless steel copper material,with fine texture,lightweight and long term use.The upgraded is made of pure copper and adopts molding technology,which solves the problem of traditional leakage.It needs to be used with a double inflation line,which can achieve inflation and pressure relief,which is and never leaks.Strengthened handle,dustproof and leakproof plug,strengthened sealing,and anti overfilling hose [Double Valves Switch Design]The empty stainless steel canister features a double valves switch for added and convenience [Easy Refilling]:This refillable air canister is designed for repeated use,making it convenient for storage and transport [Enhanced Features]:This empty tank fuel canister comes with a strengthened handle for easy carrying,a dust and leak resistant plug to protect the contents,and an enhanced sealing loop to prevent overfilling [Versatile Use]:The empty fuel canister cylinder is ideal for outdoor picnics,camping,hiking trips,backpacking trips,fishing trips,barbecues parties or self driving tours where portable stoves are needed