2-5/16"
Martin 2517 Taper Lock Bushing 2-5/16" (TB)
You will notice BSTFLEX has a professional look that suits any workshop.
LG018619 4600048432 5" Diameter Pulley 6-1/2" x 4-15/16" 2-15/16" Bore
With this unbranded option, you get solid performance without the marketing hype.