Great Planes GPMG1250 Brushless Motor Mount Small MotorsThis is the Great Planes ElectriFly Power System Brushless Motor Mount. This attaches to the firewall and the electric motor attaches to this mount. Features 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 Includes One motor support for small motors All assembly hardware Requirements Mounting to the firewall and attaching the motor Specifications 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)