This Oregon 20" guide bar and H78 chain combination features a .325" chain ideal for occasional commercial users. The low-vibration micro chisel cutters offer excellent performance, easy maintenance and low kickback. The guide bar features a small radius multi-rivet nose for good durability and control. Fits Echo, Craftsman, Homelite, Poulan, Ryobi, John Deere and others equipped with a 20" bar and .325" pitch .050" gauge saw chain with 78 drive links