The Claas 7700079977 is a genuine OEM tension spring specifically designed for various Claas DISCO series mowers. This high-quality spring is crucial for maintaining proper tensioning and reliable operation of mower components, contributing to efficient and consistent cutting performance. With a length of 120 mm, an outer diameter of 32 mm, and a wire diameter of 5 mm, it serves as a direct replacement part to ensure the longevity and functionality of your Claas machinery.