Description 1-5/8" Spool with Machined Edge. Fits 475, 496, 3800, 3850, 3900, 3950, 340, and 345 Disk. Will Replace 101189C1. This item is a suitable alternative for the following: 864-SMA101189, FC0175M, JF0175, JF10175, P101189, 101189C1