This is the Spinner for the Great Planes Revolver Sport Aerobatic GP/EP ARF 70" / / FEATURES: Aluminum construction / Silver in color / / INCLUDES: One Spinner / One Spinner Adapter / One Prop Nut / One Brass Bushing / One 4x35mm Cap Head Screw / One Allen Wrench / / REQUIRES: Installation on the plane / / SPECS: Spinner Backplate Diameter: 3 1/4" (82mm) / Spinner Backplate Mounting Ring Thickness: 3/16" (4mm) / Spinner Backplate Hole Diameter: 5/16" (8mm) / Length From Back Of Backplate To Front Of Cone: 3-1/4" (82.6mm) / Width Of Propeller Slot: 9/16" (14.25mm) / cnh 11/6/09 / / BOX DIMENSIONS: 3.25" W. X 3.25" H. X 4.00" L. / BOX WEIGHT: .28 LBS.