This is the Clutch Bell Shim Kit from Ofna.

FEATURES: Shims for the Clutch Bell for the Ofna 12 and Ofna 21 Engines.

INCLUDES: Spacers, washers, shims and allen head screws.

SPECS: Various sizes of spacers, washers and shims
One 5.0mm(0.199") allen head screw
One 10.2mm(0.402") allen head screw
One 6.8mm(0.269") spacer
One 3.8mm(0.149") spacer

REQUIRES: 2.5mm Allen wrench

COMMENTS: This shim kit may fit other Ofna Clutch Bells, modeler will need
to check with Ofna for this.