Mulching Blade / John Deere M113518Pack Size:1John Deere M113518, John Deere M76467, Scotts M113518Dealer Choice 50-4390, Edgewater 154237, ESF 114-570, Foley/PLP 114-570, Green Line 34810, Green Meadow UJD18, Laser 91605, Laser 91743, Landscaper Express 91380, Landscaper Express 135590, Landscaper Express 201145, Landscaper Express 231015, Landscaper Express 143520, Mow More JD18A, NHC JD5004, Oregon 91-384, Oregon 90-354, Oregon 491-380, Prime Line 7-06377, Rotary 6221, Rotary 15-6221, Sunbelt JD-5004, Sunbelt SB-6221, Sunbelt B1JD5024, Sunbelt B1PD5026John Deere Sabre and Z-trak F620 front mounts; requires 3 for 54" deck; Scotts S2554 (1999-2001) and GT2554 (2002) series; requires 3 for 54" deckLength: 18 5/8 ", Center Hole: 13/16 ", Width: 2 1/2 ", Thickness: .203 "