Husqvarna 16" Oregon Pro Chain Saw Repl. Chain Model #33, 44, 45, 49, 50, 51, 55, 57, 133, 154, 234, 238, 240, 242, 246, 254, 257, 261, 262, 336, 340, 345, 346, 350, 351, 353, 242xp, 254xp, 262xp, 339xp, 346xp, 346xp E-tech, 346xpg, 353 E-tech, 353g E-tech, 357xp, 357xpg, 359, 359 E-tech, 360 435, 435e, 440e, 444, 445, 445e, 450, 450 50th Anniversary, 450e, 455 Rancher, 55rancher&hellip; (2066) Fits Saws Listed That Use a .325 Pitch , .050 Gauge Chain with 66 Drive Links.. ********Fits saws listed that use a .325 pitch , .050 gauge chain with 66 drive links********