This is a genuine ETESIA 42624 spring, an original equipment manufacturer (OEM) part designed for optimal performance and durability. It is compatible with a wide range of ETESIA professional mowing equipment, including Attila, Bahia, Hydro, H-series, PHS, and PHTS models. The spring measures 120 mm in length, with an outer diameter of 20 mm and a wire diameter of 2.5 mm, ensuring a precise fit and reliable function in your machinery.