This is the Great Planes ElectriFly 12mm Ammo Gear Drive. / / FEATURES: For 12mm ElectriFly Ammo Motors and most other 12mm In-runner motors / High-precision spur and pinion gear for quiet operation / Dual ball bearing-supported output shaft / Bolts directly to the ElectriFly Brushless Motor Mount (GPMG1250) / Two different pinion gear ratios, 5.3:1 and 7.7:1 / / INCLUDES: One gear drive / All assembly hardware / Prop saver / 64T spur gear / 9T and 12T pinion gears / Collet syle prop adapter / Two rubber O-rings / Instruction sheet / / REQUIRES: Attaching to the motor mount / / SPECS: Length: 1.97" (50mm) approx. / Width: .59" (15mm) approx. / Motor output shaft dimension: 3mm / Mount Pattern: 5x8mm stick / Gear ratios included: 5.3:1 with 12T pinion and 64T spur / 7.1:1 with 9T pinion and 64T spur / Weight: .24oz (7g) / / jxs 02/01/07 / ir/jxs