ZipGear Universal (fits any lens) (1) 13.5″ .8 pitch gear, fits all lenses
Zacuto Universal ZipGear (any lens), 1 13.5-inch adjustable gear. Works on any camera, prime or zoom lens. Kit comes with 13.5″ plastic gear and black gear locking housing. Just wrap the gear around the lens, cut to size, press on gear locking housing and tighten. Installation takes one minute.
All zipgears are a .8 pitch.