Often the cause of a slow starter,this bronze bush sits in the g/box housing and acts as the front bearing for most VW starter motors.Always check/replace this if you are taking the engine out or fitting a new starter.
Available in 4 options
12v starter into 12v [1500 on] g/box -lower left
12v starter into 6v [12/1300] g/box-lower right
6v starter into 6v g/box-upper left
6v starter into 12v g/box [thin bush]-upper right