Husqvarna 531300446 16-Inch H37-56 (91VG) Lo-Pro Saw Chain, 3/8-Inch by .050-Inch Fits: 136, 137, 141, 142, 240, 335 XPT, 338 XPT and T435(Fits models 137 & 142 BEFORE Serial Number 2006100001) 3/8-Inch Pitch .050-Inch Gauge Ideal for professional users in demanding conditions High-performance, low vibration chain