This is our brand new product. It is completely made of aluminium, so it is light and not easy to get rusted. It is also with half folding backrest, auto-lock united brake, and quick release mag wheel. First, let 's look at the frame, especially the double corss tube, we use stronger tube and thicker material, so the wheelchair is of heavy duty. Secone, the auto-lock united brake. it is one of our new designs. with this brake, you can lock the wheelchair simply by lifting up the brake and release it by pressing the small botton under it. so it is very convenient and safe. Also, with the half folding backrest, it can save you some stocking space. with the blue upholstery, it is very comfortable sitting on it. The seat width of this wheelchair is 41cm and 46cm.