7 1/2″ Ribbed Disc Harrow Bearing Spool for 1″ Square Shafts Bearing Spool Ribbed 7.5″ Length 1″ Axle For Axle Size1 Inch SquareFor Spacing7-1/2 InchProduct CategoryDisc SpoolNet Weight (lbs)4.5 lbs. Interchange Numbers118-2001, CFG-1, DS209