This solid steel USA-made frame provides an extra wide stance and 6 floor contact points allowing for a very stable platform to easily get on and off. The precision lathed 3.25 inch aluminum drums make for a very smooth and quiet ride. They will not distort when exposed to heat or sunlight thereby making them ideal for outdoor use. A bi-folding design makes it easy for transporting and storage. The roller includes sealed bearings for longevity and a lifetime warranty against manufacturing defect. 390mm width. Black and silver.