Mulching Blade / John Deere M131958Pack Size:1John Deere M131958, John Deere M128485, John Deere M144196J. Thomas DE-881, Landscaper Express 20-0809, Landscaper Express 20-0188, NHC JD1090, Prime Line 7-06798, Sunbelt B1JD1090John Deere 1400 and 1500 series front mounts; Z-trak 667-797, Z820A and 2820A-2840A; and 3120-4410 compact utility tractors; requires 3 for 60" deckLength: 21 ", Center Hole: 7/8 ", Width: 2 1/2 ", Thickness: .236 "