This listing is for one replacement Bolens Mowers ball bearing, replaces code 172-8225. Measures 20mm X 47mm X 14mm and fits several mower spindles. Bearing specifications as follows: Outside dia.: 47mm Inside Dia.: 20mm Thickness: 14mm Sealed on both sides 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: 172-8225 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.