Size - Shaft hole diameter: 6mm; Outer diameter: 32mm; Thickness: 20mm; Groove width: 20.5mm Application - This guide pulley is an excellent tool for building track systems for sewing machines, such as lockstitch sewing machines. * Immediate purchase welcome, silent purchase at midnight OK ◎ * One-of-a-kind, first-come, first-served * Welcome to bulk purchases, feel free to comment * Free shipping! #☆Marilyn☆'s product list is here 14-59 ★6/