95796 4.5" Pulley Western 1.25 Tornado Fisher Poly-Caster Spreader Spinner V Belt Aluminum

New Western/Fisher Pulley # 95769. This  version is cast aluminum, they also have a -1 version that is made of steel. 

This has a 3/4" hole in the center with an allen key to lock it in place, overall it is 4-1/2" round.

This pulley is a part of chute assembly # 95785 used on the Western Tornado and Fisher Poly-Caster. It fits on the end of spinner shaft 95759. This is the standard size chute. For the extended one you will need pulley 95745.

There is also a newer version which is 95769-1. That one has two allen keys.