Wolaid Lightweight Walking Forearm Crutch is lightweight and made of sturdy extruded aluminum tube with anodized finish. The upper tube & lower tube has independently a spring lock pin for adjusting arm cuff & handle height to fit different users. Specifications: overall height 79-109 cm, dia. of central tube 22 mm, dia. of other tube 19 mm, thickness of tube wall 1.2 mm, weight cap. 110 kg, net weight 0.50 kg