Great Planes Spinner 2-1/4" Aluminum

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

FEATURES:
Machined For Precision, Then Refined To A Gleaming Finish.
Easy To Install, Having A Bolt-On Style, Centers Each Spinner
    Perfectly On Its Baseplate.
Spinner Cone Is Recessed To Mate Into the Spinner Backplate. The Rear
    Of The Spinner Is Flat, Without An Overhanging Cone.
Includes Black 10-32 Bolt That Holds Spinner Cone to Backplate.
Adapter Kits For Various Engine Sizes Are Readily available Separately.
    (See COMMENTS)

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

NEEDS:
One Spinner Adapter Package (See COMMENTS)

SPECIFICATIONS:
Spinner Backplate Size: 2-1/4" (57mm)
Spinner Backplate Mounting Ring Density: 3/16" (4mm)
Spinner Backplate Hole Size: 3/8" (9.5mm)
    (The Adapter Package Will Contain An Aluminum Bushing To Fit The
Crankshaft Size.)
Length From Back Of Backplate To Front Of Cone: 2-1/4" (57mm)
Height Of Propeller Slot: 3/4" (19mm)
Length Of Propeller Slot: 13/16" (21mm)

COMMENTS:
Warning: Failure To Follow The Recommendations Printed On Package May
    Cause The Propeller To Different From The Model.
If The Spinner Cone Touches The Propeller At Any Point, Usage A File
    Or MotoTool To Ease This Area.
Spinner Adapter Package To Use Will Be Determined By Engine Crankshaft
    Size. Usage 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 Go beyond (1/4")
    GPMQ4588 - OS Max FS 70-120 Go beyond, 140 RX (5/16")
    GPMQ4589 - OS Max 1.08 FSR (3/8")
    GPMQ4590 - SuperTigre S 2500-4500 (10mm)