Stainless steel construction: Rust-proof, corrosion-resistant, smooth and easy to clean, crack-resistant, and scratch-resistant for long-lasting durability. Thickened base: Made from thickened cold-rolled steel plate for ultra pressure resistance, strong load-bearing capacity, lightweight design, and improved stability. Safety transport: Equipped with a stabilizing steel ring to prevent accidental cargo falls, providing extra protection and security during use. Smooth and silent operation: Features two rubber wheels for smooth transportation of cylinders, minimizing noise disturbance compared to lesser quality models. Versatile usage: Suitable for both indoor and outdoor use, ideal for storing 10/15/20 L gas cylinders including gas, nitrogen, and acetylene in various environments.