20" Bar/Chain Combination, Includes H78 Chain & Is Also Referred To As 20Bpx & Has .325 Pitch, .050 Gauge, & Uses A 3/16" Files, Compatible With Select Model Saws Offered By, But Not Limited To: Craftsman, Echo, Homelite, John Deere, Poulan/Pro, Ryobi, Shindaiwa, & Tanaka.