Width:250mm / 300mm / 350mm / 400mm / 450mm / 500mm (25cm / 30 cm / 35cm / 40cm / 45cm / 50cm)
Height:300mm / 350mm / 400mm / 450mm / 500mm / 550mm (30 cm / 35cm / 40cm / 45cm / 50cm / 55cm)
Total Weight:3.5 kg (includes hardware for 300mm x 350mm back)
Maximum User Weight:75 kg (350mm wide), 136 kg (400mm wide)