OEM John Deere Part Number: UC22009, Replaces: M145476, M127500 Fits John Deere: 325, 335, 345, 355D, GX255, GX325, GX335, GX345, GX355, LT166, LT180, LT190, LX280, LX289, S240, X350, X354, X370, X380, X384, X390, X394, X570, X580, X584, Lawn & Garden Tractors; Fits John Deere: X300, X304, X320, X324, X360, Tractor Select Series; X500, X520, X534, X540, X590, Tractor Multi-Terrain Series; X710, X730, X734, X738, X739, X750, X754, X758, X940, X948, X949, Fits John Deere: Z355E, Z355R, Z525E, Z535M, Z540M, ZTrak Mowers; Z425, Z435, Z445, EZtrak Mowers John Deere lawn mower blades are manufactured with a combination of carbon and boron to provide hardness for a long life and sharp edge without breakage. 6-PACK - John Deere Original Equipment Mower Blades - UC22009,6 **SUB FOR M145476** **** FOR 48" MOWER DECK*** MOWER BLADE, MOWER BLADE 48". Specification - Length: 17.047IN. Stock Width: 2.500IN. Thickness: 0.197IN. Wing Height: 1.466IN. Hole Size: 0.797IN. Cut Length: 2.825IN. Offset: 0.733IN. Material: 10B38F. Finish: A. Fits the following John Deere Models: GX255, GX325, GX335, GX345, LT180, LT190, LX280, LX289, S240, SST18, X300, X304, X310, X320, X324, X330, X340, X350, X354, X360, X370, X380, X384, X390, X394, X500, X520, X530, X534, X540, X570, X580, X584, X590, X710, X730, X734, X738, X739, X750, X754, X758, X940, X948, X949, Z355E(050001-), Z355R, Z425, Z435, Z445, Z515E, Z525E, Z530M, Z535M, Z540M. This is a OEM John Deere Part. Thanks for looking!