Weld on Adjustable Jackshaft Kit for #35 Chain Includes (1) 13 Tooth Sprocket, 5/8" ID (1) 18 Tooth Sprocket, 5/8" ID (1) Set Adjustable Bearing Hangers (2) Sealed Precision Bearings w/ Snap Rings (2) Keys, 3/16" x 3/16" x 3/4" (2) Collar (1) 12" X 5/8" Diameter shaft with 3/16" keyway the length of the shaft