Set of three (3) replacement notched high lift Copperhead blades that fit 60" cut Hustler Code: 603992, Mowers with 5/8'' Arbor. These blades are 20-1/2" long by 2-1/2" wide with a 5/8"" center hole and 0.204" thick. Three required for a 60" cut mower deck. Made in USA by Rotary Corp Blade specifications as follows: Overall Length: 20-1/2" Width: 2-1/2" Thickness: 0.204 Mounting Hole: 5/8" Round Center Hole Note: The mowers listed for fitment, have used both 5/8'' round and 15/16'' round Arbors, Please check your arbor size before purchasing these blades. These blades will not fit mowers with 15/16'' arbors.