This is the Motor Mount for the Great Planes / ElectriFly RimFire Motors with a can diameter of 35-42mm. / / FEATURES: Aluminum construction / Four point shape / / INCLUDES: 35-42mm RimFire Motor Mount / / REQUIRES: Fastening to model and attaching motor / / SPECS: Length: 2.3" (57.9mm) / Width: 2.3" (57.9mm) / Thickness .12" (3mm) / / jxs 02/06/07 / ir/jxs