- Smooth, quiet transport: wheels with a 7 cm (2 4/5 inch) diameter enable easy movement of oxygen bottles without disturbing others, saving time and energy. - Sturdy bottle holder: base is 2 mm (0.1 inch) thick steel and the top handrail is stainless steel with a diameter of 19 mm (7/10 inches), providing durable support for daily use and easy handling by staff. - Fixed rings for versatile bottles: the top of the bottle holder features two steel rings, 6 inch (152 mm) and 6 1/5 inch (159 mm) in diameter, each capable of holding 8L/10L/15L bottles of oxygen, nitrogen, or propane. - Wide compatibility: the rack supports bottle heights of 70 cm (27 1/2 inches), 80 cm (31 1/2 inches), and 105 cm (41 3/10 inches). It is suitable for hospitals, laboratories, schools, factories, etc. - Use scenarios: moving oxygen cylinders between wards or departments in a hospital; relocating gas cylinders in a laboratory; transporting backup gas bottles during facility maintenance in schools or factories.