Brand New (6) Pack of G6 Gator Mulcher Mower Blades… (6) Pack of G6 Gator Mulcher Mower Blades Replaces John Deere Part #’s M143520 & M145516 (3) Required for 54″ Cut, Convertible Deck Blade Length: 18-15/16″ Center Hole: 13/16″ Width: 3″ Thickness. 250″Offset: 1/2″Lift: 1 Oregon Part # 396-719 Heavy-duty blades designed for commercial applications and to withstand punishing conditions, while offering the full-range of features that make Gator® series blades unique. 6 Pack Oregon 396-719 G6 Gator Blade for John Deere M143520 M145516 M152726 54. Brand New (6) Pack of G6 Gator Mulcher Mower Blades.. (6) Pack of G6 Gator Mulcher Mower Blades. Replaces John Deere Part #’s M143520 & M145516. (3) Required for 54 Cut, Convertible Deck. Oregon Part # 396-719. Heavy-duty blades designed for commercial applications and to withstand punishing conditions, while offering the full-range of features that make Gator. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.