Features: 19:1 ratio MOD 0.6 gears Fully machined and hardened steel internals 1/2in hex output shaft with M6 end tap Billet final carrier and output shaft from hardened steel Dual 6902 bearings for shaft support 4x M5 mounting holes on top and bottom of gearbox Gearbox: 5mm bore pinion (comes with 1x pinion) Designed for 35xx outrunners or 36xx inrunners with 17mm shaft length max (recommend 16mm to 17mm). ~250g weight Comes without grease added. Add grease before using to prevent damage. Gearmotor: Now takes the guesswork out of mating a motor to the repeat magnum. Comes with a 3536 mated to the gearbox 1400kv for use up to 6S 345g weight with wires and connectors 3D Model: https://grabcad.com/library/repeat-drive-magnum-gearbox-gearmotor-1 Pairs great with our new 80A AM32 drive esc: https://repeat-robotics.com/products/vortex-80a-esc-beetle-weapon-or-big-bot-drive/ Check out spare parts here: https://repeat-robotics.com/products/repeat-drive-magnum-spare-parts/