Kyosho Mini-Z MR-03 Servo Gear Set. This is a replacement set of servo gears intended for use on the Kyosho Mini-Z MR-03 platforms. Precision-engineered for a seamless fit, these servo gears are equipped as standard on the MR-03, offering a direct swap-and-go replacement right out of the package. Package includes one complete Mini-Z MR-03 Servo Gear Set.