This mower blade is 16-5/8" long with a 11/16" center hole. It fits Kubota 48" mowers, including but not limited to Kubota mowers with deck models RCK48-GR, RCK48-20ZG, RCK48P-18BX and/or RCK48S-222Z. This blade replaces Kubota blade part number K5182-71840 and others listed below. See the full list of OEM part numbers it replaces below to ensure it will fit your lawn mower properly. Sunbelt B1KU1028 XHT Mower Blade For 48" Kubota Mowers This is an XHT mower blade. That means it is made from Marbain Steel, the best steel a mower blade can made out of. You can expect it to last longer than your OEM blade or other inferior aftermarket blades. These blades are rated the Rockwell "C" hardness level. They wear 33% slower than traditional mower blades and are 40% less likely to bend or break. Perfect for sandy soil conditions, mowing rough terrain, or, best yet, manicuring a beautiful, well-maintained lawn. Made in the USA.  This is an authentic Sunbelt XHT Marbain Steel mower blade part number B1KU1028. Replaces OEM Part Numbers: KUBOTA: K5575-34330 KUBOTA: K5182-71840 KUBOTA: K5575-97530 Dimensions: LENGTH: 16-5/8" WIDTH: 2-1/2" C. H. DIA: 11/16" Blade style/lift: High Lift Need assistance? Please reference SKU A-B1KU1028.