This is an authentic Iseki 140043400100 gearbox casing gasket, specifically designed to provide a secure and leak-free seal for the transmission system. As a genuine OEM replacement part, it is compatible with various Iseki TX series compact tractors, including models such as TX1300, TX1500, TX1510, TX2140, TX2160, TX1410, TX145, TX155, and TX1210, along with their 'F' variants. Utilizing this original gasket helps maintain the integrity and optimal performance of your tractor's gearbox.