Brand New – Unused Parts. Includes (6) Blades as pictured. G6 Gator Mulching Blades for John Deere M143504. Oregon Part Number 396-771. Heavy Duty, Extended Cutting Surface. 1 1/4 Air Lift. OUR PLEDGE TO YOU. Fit and Function Guarantee. If you are not qualified to install this item, you are more than welcome to return it.