Beautiful billet mirror. Adds a custom look to you rail. This mirror can go on the left or right side. Simple bolt on installation. Mounts with a 10mm 1.25 and 8mm 1.25 threaded nut adapter. Sold Each Front Dimension: 4.5 inches x 2.25 inches Thickness: 1-3/4 inches Arm Length: 5-7/8 inchesSide Mirror Left Or Right Side Rectangular Each