This is the Motor Mount for the Great Planes / ElectriFly RimFire Motors with a can diameter of 50-63mm. / / FEATURES: Aluminum construction / Four point shape / / INCLUDES: 50-63mm RimFire Motor Mount / / REQUIRES: Fastening to model and attaching motor / / SPECS: Length: 3.2" (81.5mm) / Width: 3.2" (81.5mm) / Thickness .20" (5mm) / / jxs 02/06/07 / ir/jxs