Model Number YN-st002 Material PU The cushion size: 445mm*400mm Back of a chair size: 400mm*260mm Steam lever Adjust the stroke: 120mm-180mm Lift way Steam lifting Chair foot Zinc alloy  die casting Diameter of foot 640mm Load capacity 550kg Caster High quality imported mute casters Highest seat cushion size 615mm Lowest seat cushion size: 485mm Weight of seat 15.6kg Packing weight: 16.1KG Packing size: 560*290*570mm