Husqvarna 531300438 18-Inch HLN250-72 Pixel Chain Saw Bar, .325-Inch by .050-Inch Fits: 41, 45, 49, 51, 55, 336, 339XP, 340, 345, 346 XP, 350, 351, 353, 435, 440, 445 and 450e .325-Inch Pitch .050-Inch Gauge Ideal for professional users in demanding conditions High-performance, low vibration chain