The guides are made from a very hard material that is resistant to wear and high temperatures encountered when working with a chainsaw. They operate under the most challenging conditions without damage. They optimally transfer the cutting force to the cutting performance. Finished with a frame, secured with 4 rivets. Specifications: Bar length: 18 inches (45 cm, cutting length, not the total bar length). Chain pitch: 0.325 inches. Width of the rail groove: 1.5 mm. Number of guides: 72. Number of cutting teeth: 36.