The U-4 Gear-Driven Crossarm from Cambo is made for the UST studio stand. It has two mounts on either end for attaching camera platforms or other compatible accessories. A crank on the collar moves the cross arm left and right. It is 39.4" long and can be moved a distance of 17.3" so that the mounts are a minimum of 11.0" from the center column and a maximum of 28.3".
Compatible with the U-7, U-9, U-10, U-29, and U-36 camera platforms; the U-6 extension tube, the SCH-U tripod head and the U-45 low position adapter.