This is a Tecumseh pull starter cup. This is correct for Rokons and Power Bee engines that spin clockwise on the flywheel side.
It is supplied with 2 1X10.5 mm o-rings that are used to center the 1/2″ ID cup on the 7/16″ OD crankshaft.
There is a tab on the bottom of the cup that either needs to be removed or a 3/8″ dia. x 1/4″ deep hole can be drilled in the flywheel to accept it as an anti rotation tab.