Based on this product's specifications, here are some alternatives and similar models
Tetra impeller EX 400 Plus for external filter — replacement rotor (MPN 260160)
Summary description:
Replacement impeller (rotor) for Tetra EX 400 Plus external aquarium filter. Manufactured by Tetra, model MPN 260160, this impeller is a direct-fit spare part designed to restore pump flow and filtration performance. Suitable for maintenance and repairs of the EX 400 Plus unit, it helps maintain water circulation and proper filtration in freshwater aquariums.