Genuine oregon chainsaw chain.oregon is well known for making high quality, reliable and durable products. This 10 inch replacement chainsaw chain has 38 drive links of type 91 chain.type 91 3 8 91 1.3mm 0.50chain offers outstanding performance in addition to low kick back and vibration.suitable for the following modelsmcculloch m1, m2, m2b, m4, m4b, m6, m6boregon type 91 chamfer chisel equivalent to carlton n1c, stihl picco micro, duro, super, stihl 63pm, husqvarna h43x, em s43x, windsor 50r, homelite 35 m50, gb sabre, tsc, excel 357, dolmar 92.