AN2311 contact wheel is a .75" (3/4) x1" smooth 70 duro urethane wheel that fits forked style arms.   The AN2311  comes with bearing and 3/16" diameter shaft.

 

Requires 1436 bushing to use with arm.  The 1436 bushing is 3/16" - 1/4" and comes as a set of two

 

The AN2311 is used with the 965 Small wheel attachment and the 1442 arm.