Dave Brown spinner is constructed of lightweight aluminum. Polished, brushed aluminum color. Includes four plastic backplate bushings, so the backplate will fit securely around any ordinary crankshaft. Designed for two-bladed props.
Spinner Backplate Diameter: 3-1/2" (89mm) Spinner Backplate Mounting Ring Thickness: 3/16" (4mm) Spinner Backplate Hole Diameter: 3/8" (9.5mm) Length From Back Of Backplate To Front Of Cone: 3-7/16" (87mm) Weight: 4.1 oz.