The Eheim 2217/2317 Impeller Spare Part Number 7633590 is a replacement impeller designed for external filters, specifically for tanks with a capacity of 100-150 gallons. With a flow rate of 264 GPH and a power consumption of 20 W, this unit is suitable for all water types in aquariums. It is a genuine Eheim product, ensuring quality and compatibility with the specified filter models. Ideal for maintaining clean and healthy water in your aquarium, this impeller spare part is a practical and necessary addition to your fish tank setup.