This is the 1-1/2" 2-Blade E-Spinner from ElectriFly. / For electric applications only, / not for use with gasoline or nitro powered aircraft. / / FFEATURES: Constructed of machined aluminum / Silver in color / Fits 5mm and 1/4" prop shafts (reaming guide for 5/16") / One year warranty / / INCLUDES: Spinner, backplate, and 5mm ID Bushing / / REQUIRES: Adapter depending on motor and aircraft: / 5mm Adapter (GPMQ4730) / 1/4" Adapter (GPMQ4731) / 5/16" Adapter (GPMQ4732) / 3/8-24 Adapter (GPMQ4733) / / SPECS: Length: 1.69" (43mm) / Diameter: 1.5" (38mm)