Brand New (6) Pack of G6 Gator Mulcher Mower Blades… (6) Pack of G6 Gator Mulcher Mower Blades Replaces John Deere Part # M143504 (3) Required for 62″ Cut, Convertible Deck Blade Length: 21-9/16″ Center Hole: 13/16″ Width: 3″ Thickness. 250 Oregon Part # 396-771. 6 Pack Oregon 396-771 G6 Gator Mulcher Mower Blade for John Deere M143504 62. Brand New (6) Pack of G6 Gator Mulcher Mower Blades.. (6) Pack of G6 Gator Mulcher Mower Blades. Replaces John Deere Part # M143504. (3) Required for 62 Cut, Convertible Deck. Oregon Part # 396-771. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.