The Husqvarna Part #531005138 Spring is a genuine OEM replacement designed to maintain proper tension and ensure smooth, reliable operation in compatible outdoor power equipment. Made from high-tensile, rust-resistant spring steel, it provides long-lasting durability and consistent performance. Compatible with select Husqvarna models as well as brands like Dixon, Craftsman, Poulan, and RedMax, it offers a perfect fit for easy installation and optimal functionality.