Up until now there were no choice for different actuator sizes for the FUJIN III lever.  Thankfully, due to all the requests from FUJIN III users, IST finally released an actuator kit comprising of four different sizes, 15, 15.2, 15.4 and 15.6.   These actuators work with both the full collar and mid-collar FUJIN III levers

Please note these are available only as a kit