The ProperAV Two Tier Stand Up Desk Converter Worktop with Gas Spring Lift & Variable Height Settings features a generous worktop with a separate keyboard shelf and high quality tough work surface. Features also include a smooth gas spring lift mechanism with variable height settings, steel chassis with a maximum load of 15Kg. The ergonomic features are designed to make this product work perfectly in the home or at the office. Main work surface dimensions: 800 x 400mm Keyboard dimensions: 795 x 300mm Total outside dimensions 800 x 615mm Height range: 110-505mm