The alm ch066 is a replacement chainsaw chain designed for electric and petrol chainsaws fitted with a 40cm guide bar and requiring 66 drive links. Manufactured by alm to fit a wide range of chainsaw makes and models, this chain provides a reliable replacement option for maintaining cutting performance. This chainsaw chain features a 3 8 inch low profile pitch with a 0.043 inch 1.1mm gauge, making it compatible with standard low profile guide bar slots. The 66 drive link configuration is specifically designed to fit ryobi chainsaw models including the pcn 3840 and pcn 4040, though the chain's specifications suit other brands with matching bar and chain dimensions. Ideal for general garden maintenance, tree surgery work, and firewood cutting, this replacement chain helps restore cutting efficiency to worn or damaged chains. The low profile design offers smooth operation whilst maintaining effective cutting performance across softwood and hardwood applications. Features and benefits bull low profile pitch design for smooth, controlled cutting action bull compatible with multiple chainsaw brands sharing the same bar specifications bull manufactured to standard dimensions ensuring proper fit and performance specifications bar size cm 40 no. Links 66