Adjust height:33-38cm [Size]Center distance of installation hole: 2.36×1.2 inch. Hole size: 0.7inch [7cm adjustable height] The height of the armrest is between 31-38cm, and the height can be adjusted by 7cm [Move left and right] The armrest pad can be rotated left and right by twisting [Move back and forth] The 3D armrest pad can move back and forth [Sold in Pairs] Come with two handrails, one installation package, one installation instruction