Aftermarket Replacement Set of three (3) Oregon X-Tended Cutting Length Notched blades that are compatible with 60" Exmark Explorer II mowers with 60" Decks. Each blade measurers 20-1/4" long 2-1/2" wide, 0.203" thick with a 5/8" center mounting hole and a full 1" air lift, takes 3 blades for 60" cut . Equipped with the X-Tended Cutting Length to optimize the cutting efficiency with each revolution. Enhanced mulching for bagging and discharge efficiency, stays sharp and durable for longer. Fits the following Exmark Explorer II mowers with 60" Cut Decks: EXS-18K0, EXS-18K0-2, EXS-20KC, EXS-20KC-2, EXS-20K0 Replaces: Exmark: 1-513972 & 513972 Oregon:91-259 Blade specifications as follows: Overall Length: 20-1/4" Width: 2-1/2" Thickness: 0.203 Mounting Hole: 5/8 Round Air Lift: 1" If you are not sure if these will fit your mower just send me an email with your model number and I will be happy to confirm them for you! One day handling! We have more lawn and garden items available than we have time to list them. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. We stock a wide variety of replacement parts for most Lawn and Garden and Agricultural Equipment please contact us if you have any questions or if you would like more information. Your satisfaction is important to me, if you have any questions, concerns or comments please let me know, I will do everything I can to answer your questions, correct your problem and help you out.!