This is the Replacement Aluminum Spinner for the Great Planes Super Stearman.
This is the cone that surrounds the propeller.
FEATURES: Aluminum construction
INCLUDES: One 2 1/2" (63mm) aluminum spinner
One spinner backplate
One 5/16"-24 spinner adapter
One 8-32 x 1" caphead machine screw
One 3mm allen key
REQUIRES: Installation onto engine with 5/16-20 crankshaft threadsize.
SPECS: Diameter: 2 1/2" (63mm)
Height: 2 1/4" (56mm)
Propeller blade slot width at backplate: 0.95" (24mm)
Propeller slot width: 0.63" (16mm)
Propeller slot height at tallest point
perpendicular to base: 0.90" (22.8mm)
Center of angled slot length from base to rounded end: 1.14" (29mm)
COMMENTS: The outer wrapping has a sticker stating this is a .91 size spinner.
That is incorrect, the spinner is for the 1.20 Super Stearman