Featuers 1.Help sitting in right position , alleviate the aches and pains of shoulder. 2.Aluminum material make it durable. 3.This elbow stand can be fixed on the desk from 0-60 mm thickkness 4.Flexible and adjustable freely. Ergonomic design and easy for fixing Correcting sitting position Free rotation Height freely adjust Aluminumstand Easy for fixing, you can install to the chair or table. Color:Black/Gray/Silver Material: Metal Aluminum Package Contents: 1 x Aluminum bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.