This RT Motor Gear (0.8-Mod Wide) from Teradek is designed for use with an RT MK3.1 or MK3.0 lens control motor. The wide surface of this gear provides a larger interface for lens barrels that move through an extended focus or zoom range. This 32-pitch gear is compatible with the focus, iris, and/or zoom rings on select cine and/or ENG lenses as listed below.