Eheim Plastic Hose 3 Meter 12/16 mm Manufacturer's part number: 4004943 For the Eheim Filter Models: 2211, 2213, 2215, 2217, 2222, 2224, 2322, 2324, 2226, 2228, 2326, 2328, 2232, 2234 and 2236.