Fluval 404-405 Tune Up Kit Bundle Includes: Magnetic Impeller, Impeller Cover, Ceramic Shaft and Rubber Support, Motor Seal Ring All items in the bundle are replacement parts created for the Fluval 405 External Canister Filter The Impeller Cover, Ceramic Shaft and Rubber Support, and Motor Seal Ring are also suitable for Fluval 305 External Canister Filter Extend the working life of your aquarium filter with our tune-up kit of spare parts