This Oregon SpeedCut Combo set includes a premium 18" (45cm) guide bar and chain. Designed for fast cutting with its narrow kerf, the chain has 72 drive links, a .325" pitch, and a .050" (1.3 mm) gauge. The guide bar features a 10-tooth sprocket nose and a Lubri-Tec™ oiling system for reduced friction and a longer life. The set is lightweight, durable, and compatible with a wide range of chainsaws up to 55 cc, including models from Craftsman, Husqvarna, Jonsered, and others.