This replacement air foot control comes with a hose and is part of Singer Part # 988667-001.
For Singer models 4610, 4613, 4617, 4623, 4663, 5910, 6233, 6234, 6235, 6250, 6251, 6267, 6268, 7000, 7004, 7005, 7033, 7037, 7043, 7050, 7060, 9000, 9020, 9110, 9113, 9117, 9124, 9130, 9133, 9134, 9137, 9143, 9210, 9217, 9224, 9240, 9323, 9334, 9400, 9410, 9416, 9430, 9444