One set of 2 "Gator" style mulching blades for all John Deere models X330, X350, X354, X370, Z335E, Z335M, Z345M, and Z345R with 42” side discharge two blade mowers. I guarantee these blades to fit models listed if your model deck has 2 blades and discharges clippings out the side. Excellent replacements for original John Deere blades part number M170639 and UC22008. Made in the USA. Order 1 to get a set of 2 blades!

These blades are excellent replacemsnt for John Deere part number M170639. They are 21.4 inches long (cutting edge to cutting edge), 2.5 inches wide and have a .797 center hole. They are .156 “ thick. These blades are not made by Oregon who made the original Gator style mulching blades. To my knowledge Oregon does not provide a Gator blade for these models yet. These blades are made by Fisher Barton who makes the majority of OEM blades.