Specifications Material: PU, PVC, Iron Tool Tray Material: PP Color: Red, Black Installation Requirement: Yes Base Type: Universal Wheels Backrest Height: 30.2cm/11.9in Seat Size: 48.5*31*30.2cm/19*12.2*11.9in Adjustable Height: 69.5-81.8cm/27.4-32.2in Tool Tray Diameter: 55cm/21.65in Wheel Diameter: 12cm/5in Loading Capacity: About 100kg/220lbs Packing Size: 59*57.3*34.6cm/23.2*22.6*13.6in Gross Weight: 9.5g/20.94lbs Net Weight: 9.3kg/20.5lbs .