Hi-Lift Blade / John Deere M74175Pack Size:1John Deere M74175J. Thomas BO-357, NHC 212-0623, Prime Line 7-06799John Deere 400, 420 and 430 series; F910-F935 and F1145 front mounts with rear discharge; 670-970 series compact utility tractors with 60" deck; requires 3 for 60" deckLength: 20 1/2 ", Center Hole: 29/32 ", Width: 2 1/2 ", Thickness: .305 ", Heavy-duty, Requires 3 for 60" cut