Great Planes Spinner 2-1/4" Aluminum

This is a Two-Blade Aluminum Spinner w/Aluminum Backplate from Great Planes.

FEATURES:
Machined For Accuracy, Then Polished To A Gleaming Finish.
Easy To Set up, Having A Bolt-On Design, Centers Each Spinner
    Completely On Its Baseplate.
Spinner Cone Is Recessed To Mate Into the Spinner Backplate. The Back
    Of The Spinner Is Flat, Without An Overhanging Cone.
Includes Black 10-32 Bolt That Holds Spinner Cone to Backplate.
Adapter Kits For Different Engine Sizes Are Readily available Separately.
    (See REMARKS)

INCLUDES:
One Aluminum Spinner Cone
One Aluminum Backplate (See Specs For Sizes)
One 10-32 x 1" Installing Bolt
One Box with Setup Instructions and Safety Tips

NEEDS:
One Spinner Adapter Set (See REMARKS)

SPECIFICATIONS:
Spinner Backplate Diameter: 2-1/4" (57mm)
Spinner Backplate Installing Ring Thickness: 3/16" (4mm)
Spinner Backplate Hole Diameter: 3/8" (9.5mm)
    (The Adapter Set Will Consist of An Aluminum Bushing To Fit The
Crankshaft Size.)
Length From Back Of Backplate To Front Of Cone: 2-1/4" (57mm)
Height Of Prop Slot: 3/4" (19mm)
Length Of Prop Slot: 13/16" (21mm)

REMARKS:
Caution: Failure To Follow The Recommendations Printed On Package May
    Cause The Prop To Different From The Model.
If The Spinner Cone Touches The Prop At Any Point, Use A File
    Or MotoTool To Ease This Area.
Spinner Adapter Set To Utilize Will Be Determined By Engine Crankshaft
    Size. Use Among The Following:
    GPMQ4581 - OS Max 20-40 FP, 25-46 FX & SF (1/4")
    GPMQ4584 - OS Max 60 FP, 61 FX & SF, SuperTigre 61 (5/16")
    GPMQ4585 - OS Max FS 26-52 Surpass (1/4")
    GPMQ4588 - OS Max FS 70-120 Surpass, 140 RX (5/16")
    GPMQ4589 - OS Max 1.08 FSR (3/8")
    GPMQ4590 - SuperTigre S 2500-4500 (10mm)