This genuine MTD 7420719 mulching blade is a 19-inch replacement blade designed for 38-inch cutting decks on various MTD-manufactured lawn mowers, including brands like MTD, Cub Cadet, Troy-Bilt, Yard-Man, Yard Machines, Huskee, Bolens, and White Outdoor. It features a 6-point star center hole, a width of 57.15 mm (2.25 inches), and a thickness of 3.81 mm (0.15 inches), ensuring efficient mulching performance.