The Fluval A20135 is an official replacement impeller cover specifically designed for older-model Fluval 204 external canister filters.
It is precision-molded to fit only the version of the 204 impeller that features curved blades.

• Part Number: A20135
• Compatibility: Fluval 204 canister filters with curved blade impellers
• Function: Shields and protects the impeller while regulating water flow inside the filter housing
• Material: Durable aquarium-safe plastic