Specification Cushion Material: PE Support Material: Aluminum Alloy Foot Pad Material: Rubber Screw Material: Stainless Steel Process: Anodizing Maximum Load Capacity: 100kg/220lbs Adjustable Height: 42-53cm/16.5-20.9in Sitting Board Size: 40*32cm/15.7*12.6in Foot Cushion Diameter: 5cm/2in Each Aluminum Alloy Base Size: 11*5.5cm/4.3*2.2in Sitting Board to the Wall Distance: 5.8cm/2.3in Net Weight: 2.2kg/4.85lbs Gross Weight: 2.5kg/5.51lbs Package Size: 49*9.5*43cm/ 19.29*3.74*16.93in.