The unbranded 390700B control lever is engineered for 46 Series 520 hydrostat systems, providing precise and reliable operation. This aftermarket lever is a direct replacement for various Exmark Lazer Z series models, including HP, XP, XS, X-Series, S-Series, E-Series, AS, DS, and LC. It also fits Toro Grandstand and Z Master G3 series mowers. This lever serves as an equivalent to Exmark part number 1603173 and Toro part number 1603173, ensuring compatibility and restoring optimal control to your mowing equipment.