This is the Great Planes ElectriFly Power System Brushless Motor Mount.
This attaches to the firewall and the electric motor attaches to this mount.
FEATURES: Direct replacement for the Great Planes GPMG1101 1.20-1.80 cu in
(20-30cc) glow mount
Perfect fit for 63mm RimFire, Outrunner motor 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)
INCLUDES: One motor support for extra large motors
All assembly hardware
REQUIRES: Mounting to the firewall and attaching the motor
SPECS: Length: 3.56" (90.5mm)
Width: 3.09" (18.5mm)
Height: 2.56" (90.5mm)
Weight: 5.1oz (145g)
Mounting hole dimensions: 1.94"x1.94"(49.3x49.3mm)
COMMENTS: *Large motors install on outside of mount cage.