Each side operates independently to provide easy movement through narrow spaces and greater stability when standing up, while the front cross braces are located near top of walker to allow full stride. Sturdy 1 aluminum tubing is lightweight and folds to a slim 4 1/2 for easy transportation and storage. Contoured textured latex free PVC handgrips provide additional patient comfort.Features Width inside hand grips 18 Width inside base legs 21 Depth opened at base 16 300-lb weight capacity Limited lifetime warranty on frame Six month warranty on handgrips, push buttons, feet, wheels, glide caps, and any other parts Height Adjustable without Wheels 25 Height Adjustable with Wheels 25.5 32.5 4 Each / Case