#20021 - Fits Multiple (See Description) fits 2mm motor shafts
#20021 - Fits Multiple (See Description) slip fit, attach with #20010 flywheel cement
Fits: Mashima and other can motors when used in Athearn S12 & SW's and narrow hood units with a short wheelbase such as AHM Alco 1000. Also fits in many steam repowering applications.
