Great Planes Brushless Motor Mount Large Motors FEATURES: Direct replacement for the Great Planes GPMG1091 .60-1.20 (10-20cc) glow mount. Perfect fit for both 50mm RimFire Outrunner and 36mm Ammo In-runner motors. Universal motor mounting bolt pattern insures an easy fit with many brands of motors. Lightweight aluminum construction for added durability. Unlimited adjustability from 3.5-4.6 (89-117mm). For large motors.;INCLUDES: One motor support for large motors. All assembly hardware.;REQUIRES: Mounting to the firewall and attaching the motor.