Features:brand new and high qualityErgonomic Design - Perfectly provide support for the weight of arm. Keep the wrist, hand and elbow in a straight line, and take the arms, shoulders, neck and spine' s stress off.Dimension - The armrest is 11.4 x 5.5 inch, will be higher than the table top while installation. Suitable for the table which is 0.5 to 2.3 inch thick without decorative strip or bevel in edge.The fastening clamp have a rubber to increase the friction between the clamp and the table to stop slipping.Material - The surface is covered by rubber which is difficult to fall off, different from the plastic pad. The adjusting screw and clamp is made of ABS, which can swivel back-and-forth.No need to assemble, can be installated in less than 5 minutes. Specifications:Material: ABSColor: Black, Red, Yellow (optional)Hand Rest Size: About 29x14cm/ 11.42x5.51inScrew Size: About 8cm/ 3.15inConnection Clamp Size: About 6cm/ 2.36in Note:Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size. Package includes:1x Arm Rest Support