Oregon 396-719 PK3 Gator G6 Mulcher Blades - 18-15/16" Pack of 3 Replaces: John Deere M143520, M145516 ,M152726; Sunbelt: B1PD5054, B1PD1054 Length:18-15/16" ; Width: 3.00"; Thickness: 0.250"; Center hole size: 13/16"; Air Lift: 1" Major brand replacement: John Deere