7-1/2" Disc Spool Bearing Assembly For 7-1/2" Disc Spacing for 1" Axles Fits 1" Square Harrow Axle (1) 7-7/16" Tall Rib Spool with Both Caps and Bolts and Nuts For Grease Type Harrow Bearings - Fits Several Different Type of Brands Caps are 5-1/4" Long, Center to Center on the Holes is About 3-1/8" (2) 1/2" x 5-1/2" Long with Nuts with Nylon