CowboyStudio RL02 Kit DSLR Rig With Follow Focus and Matte Box Gears Nylon and ABS Dial Index Adjustment : 360 degrees Mattebox Material: ABS Follow Focus Mounts onto 15 mm Rod Support Compatible with industry stand 15mm rods 1/4 inches female adapter at bottom Lens Max support up to 77mm Flexible gearbelt can be used with any zoom or prime lenses with a wide range of lens diamter