DOP21LPX078GHU Loop-Saw Chain. 20 Series Super 20 Chisel Chain .325 Pitch, .058 Gauge, 78 Drive Links. Fits Husqvarna model 133, 140, 140S, 154, 234, 238, 240, 242, 242XP, 246, 254, 254XP, 33, 340, 340E, 345, 346, 346XP, 346XP E-TECH, 346XPG, 350, 351, 353E-TECH, 353G E-TECH, 359, 360, 38, 40, 435, 435E, 44, 440E, 444, 445, 445E, 45, 450, 450E, 49, 50, 51, 55, 57 Chain saws.