Toothed Blade / John Deere M143520Pack Size:1John Deere M143520Oregon 396-719John Deere GT225-GT245, GX255, GX325-GX355, LX266, LX280, LX288, X340, X465-X495, X500, X520, X534, X540 and X575-X595; requires 3 for 54" deckLength: 18 7/8 ", Center Hole: 13/16 ", Width: 3 ", Thickness: .250 ", Heavy-duty