Material description Rear back pane/seat pan : elegant molded-wood panel, scratch resistant. Back/seat cushion : ergonomic molded foam for optimal comfort. Standard/stanchion: strong steel structural support, electrostatic powder coated Armrest: hardwood armrest, housing writing tablet available. Lifting mechanism: tip-up seat with combination of spring and damping provides for years of smooth operation. The writing board can be choiced:pp¡¢fire board or aluminum. 120x800x900, 20kgs