This is the Dubro 2-1/4" Diameter Black Spinner. FEATURES: Constructed of 100% Virgin Nylon for maximum strength. Pre-trimmed for two blade propeller. Uses a unique nylon insert lock design for attaching the backplate and spinner-giving a solid and secure hold. Four shaft adapters, 6mm, 1/4", 7mm, 5/16", eliminates need to drill out backplates. INCLUDES: One Dubro 2-1/4" Diameter Black Spinner with backplate, four shaft adapters, and two 3.5mm x 18mm socket head cap screws. REQUIRES: Aligning pins in nose cone to backplate and fastening into pre- installed locknuts with the two socket head cap screws. 7/64" ball driver SPECS: Diameter: 2.25" (57mm) at base Length: 2.44" (62mm) from backplate to tip JXS 3/27/02 ir/kh