Suitable Tanks Dia＜17cm(6 7/10in): This oxygen tank carts are equipped with a Ring that secures the nitrogen tank to the hydrogen tank trolley in a seamless manner and prevents the tank from falling Steel Bracket: This small gas cylinder hand truck is made of steel and has anti-rust performance. Its thickened and reinforced feature ensures that you are not afraid of scratches and wear when using the oxygen cylinder trolley, thus increasing its service live Silent Wheel: The wheels are made of rubber and large ball bearings, offering silent and wear-resistant performance. When pushing the oxygen cylinder trolley, no noise is generated, providing you with a better user experience. They are the ideal for scenarios requiring quiet operate Fits All Common Gas Cylinders: This oxygen tank cart dolly is specially designed for safe storage and transportation of various gas cylinders, making it the perfect solution for handling oxygen, argon, carbon monoxide, propane, helium, and more Widely Used: The gas cylinder hand truck is designed for a range of applications, making it perfect for transporting Oxygen Gas Cylinders suitable for ambulances, factories, laboratories, hospitals, schools, care homes, and workshops. Its design ensures safe and efficient transportation, suitable for both personal and professional use