The special part of this follow focus is it can use different size gears. It can work with 3 different size gear to meet your different need with various lens:
M0.8-38T gear: 38x0.8mm pitch,diameter is approx.28mm
M0.8-43T gear: 43x0.8mm pitch,diameter is approx.31mm
M0.8-65T gear: 65x0.8mm pitch,diameter is approx.49mm
Note: Only 1pcs gear included,and you can choose the one you like. We will ship the standard 43T if not request before shipment.
Quick-Release Version, easily attached and detach.
Material: Aluminum Alloy, Plastic. Improved design has dampening which gives virtually zero backlash(