Jonsered 20" Oregon Chain Saw Repl. Chain Model #2050, 2050 Turbo, 2051, 2054, 2055, 2149, 2149 Turbo, 370, 410, 420, 425, 435, 45, 450, 451, 455, 49, 50, 51, 510, 52, 521, 525, 535, Cs2145, Cs2149, Turbo, Cs2150, Cs2152 W, Cs2153, Cs2156, Cs2159, Cs2159c, Cs2159wh, Cs2163, Cs2245, Cs2250, Cs2250s, Cs2255 Fits Saws Listed That Use a .325 Pitch , .050 Gauge Chain with 78 Drive Links Sold on Amazon