Great Planes Spinner, 2", Nylon Alum Black FEATURES: No spinner nut required; Engine shaft hole is stepped to perfectly center the opening if englarging is needed; Sturdy Aluminum backplate hold INCLUDES: One Black Spinner cone One Aluminum backplate Two 3/32 x 5/32 S/T screws INCLUDES: One Black Spinner cone One Aluminum backplate Two 3/32 x 5/32 S/T screws