Compatible with Ariens / Gravely ZERO-TURN 991013, 991019, 991020, 991038, 991040, 991041, 991042, 991055, 991056, 991057, 991064, 991067, 991070, 991075, 991078, 991081, 991084, 991087, 991091, 991097, 991101, 991102, 991103, 991106, 991107, 992115, 992117, 992121, 992131, 992132, 992133, 992134, 992135, 992136, 992137, 992145, 992147, 992151, 992152, 992153, 992154, 992155, 992156, 992159, 992162, 992164, 992166, 992172, 992173, 992175, 992182, 992185, 992187, 992188, 992189, 992190, 992194, 992195, 992198, 992201, 992203, 992204, 992207, 992210, 992214, 992215, 992217, 992225, 992227, 992232, 992233, 992234, 992235, 992236, 992237, 992244, 992248, 992251, 992252, 992254, 992257, 992260, 992262, 992265, 992266, 992267, 992269, 992272, 992274, 992275, 992278, 992280, 992281, 992292, 992316, 992317, 992326. Not only compatible with these models, Please check the part number for more compatible models.