This is the Great Planes ElectriFly Power System Brushless Motor Mount.
This attaches to the firewall and the electric motor attaches to this mount.
Perfect fit for both 28mm RimFire, Outrunner and 24mm Ammo In-runner
Universal motor mounting bolt pattern insures an easy fit with many
brands of motors
Lightweight aluminum construction for added durability
Unlimited adjustability from 1.6-2" (40-51mm)
For small motors
One motor support for small motors
All assembly hardware
Mounting to the firewall and attaching the motor
Length: 1.65" (42mm)
Width: 1.97" (50mm)
Height: 1.44" (36.7mm)
Weight: 1.2oz (35g)
Mounting hole dimensions: 1.19"x1.19" (30.2x30.2mm)