The ProperAV Two Tier Height Adjustable Stand Up Desk Workstation Worktop is made of eco-friendly particleboard and features step-less height adjustment with the assistance of a gas spring strut. The embedded groove offers a stand for most phones/tablets and the non-skid silicone pads protect your work surface from scratches or scuffs. There's also plenty of room for your keyboard and mouse, thanks to the keyboard tray which was designed specifically to protect your elbows. Total Dimensions 800 x 615mm Main Work Surface Dimensions 800 x400mm Height from 110 to 505mm