Solid Construction - Tray made of solid all-metal construction, with non-slip straps is designed to keep your monitor safe and secure at all times.Dimension: 15.4 x 11 x 0.5 inch/39 x 28 x 1.3cm.Fits laptop/notebook up to 17 , Load 22lbs. Compatibility -The bottom of the tray has a 38mm Arcac-Swiss interface with all Arca Swiss clamp ballhad quick release adapters. and a 1/4 and 3/8 female screw for all tripod install; Easy to install and remove.