One replacement aftermarket USA made blades that fits Kubota models equipped with a 54" cut mower that include the RC54-24B, RC54-71B, RC54-B, RC54-FZ21, RC54-G20, RC54-F19 and RCK54-18Z decks. This is a high quality Oregon Brand replacement blades, remember this listing is for one blade.. Blade specifications as follows: Overall Length: 18-1/2" Width: 2-1/2" Thickness: 0.240" Mounting Hole: 1-1/8" Fits Models: RC54-24B RK54-71B RC54-B RC54-FZ21 RC54-G20 RC54-G19 RCK54-18Z 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. Part Numbers: K5613-34330 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.!