Number 27a in exploded view
Sachs original number 1026010-1000
Dimension 8.6x19.4x19 mm (internal x external x length)
Note that there are slightly different widths on some bushings in different Sachs models .
Most often it is as below but check measure on your engine so you get the right bushings.
15.2 mm set on 2 gears, both top and block, also on 3 vxl hand gear in the top.
19 mm set on 3 vxl hand gear in block and also in top on 3/4 vxl foot gear.
21 mm set on 3/4 vxl in block