Good used mower part. Came off a working mower. Hydrostatic drive for Toro and Exmark zero turn mowers. I would recommend replacing the two main #8 fitting orings. Just unscrew the fittings and replace the seat orings. They are both #8 ORB orings. Description: Drive motor, hydrostatic. We are a legitimate service business so we know how to test and verify all the parts that we sell, no guesswork.