This is the RV-4 ARF 3 1/4" Aluminum Two-Blade Spinner from Great Planes.
FEATURES: Light-weight aluminum construction
Polished, brushed aluminum color
Includes spinner nut and 4x34mm screw
Designed for two-bladed props
INCLUDES: One two-blade aluminum spinner
One aluminum backplate
One 4x34mm cap head mounting screw
One spinner adapter (5/16-24 thread)
REQUIRES: Assembly on to the Extra 300S
3.5mm Hex Wrench (For The Cap Screw)
SPECS: Spinner Backplate Diameter: 3-1/4" (82mm)
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: 3-1/4" (82mm)
Weight: 3.35 oz. (95 grams)
Upd OA 8.21.07
JiM 3.29.07
ir/jxs