Husqvarna 531300447 12-Inch HL280-45 Lo-Pro Chain Saw Bar, 3/8-Inch by .050-Inch For Models 325P4, 326P4, 326P5X, 334T, 335XPT and 338XPT. Original replacement bar - specifically designed for Husqvarna chain saws 3/8-Inch Pitch .050-Inch Gauge Ideal for professional users in demanding conditions Specifically designed to increase the saw's capacity and effectively reduce vibration