Aluminum Frame in bright colors. Height adjustable. Soft rubber wheels adhere to any surface and will not allow the Nimbo to slide backwards. One directional rear wheels with aluminum ratchet and pin mechanism. Anti-Reverse override bracket disengages the one directional rear wheels and allows forward & reverse mobility. Front swivel wheels enhance maneuverability and ease of turning. Locking mechanism easily switches front wheels from swivel to non-swivel. Each wheel is independently adjusted. Skid resistant, non-marring and easy rolling wheels are ideal for indoor and outdoor use. Latex-free handgrips with flanged ends. Folds easily for convenient transporting. 3 year Limited Warranty.