6-PACK - John Deere Original Equipment Mower Blades - UC22010,6. *STD SUB FOR M143520* MOWER BLADES, MOWER BLADE 54". Specification - Length: 18.976IN. Stock Width: 2.670IN. Thickness: 0.187IN. Wing Height: 1.303IN. Hole Size: 0.799IN. Cut Length: 4.828IN. Offset: 0.718IN. Material: STEEL. Finish: A. Fits the following John Deere models: GX255, GX325, GX335, GX345, GX355, LX280, X320, X340, X360, X380, X384, X390, X394, X500, X520, X530, X534, X540, X570, X580, X584, X590, X750, X754, X758, Z375R, Z425, Z435, Z445, Z515E, Z525E, Z535M, Z540M. This is a OEM John Deere part. Thanks for looking!