Fluval 304-305 Tune Up Kit
The parts included are:A-20152 Fluval Impeller (White straight Blades)    A-20063 Fluval Seal Ring 304/305    A-20066 Fluval Impeller Shaft 304/305    A-20156 Fluval Well Cover (Grey)These parts are manufactured by Hagen (makers of the Fluval). Replacement parts for the 404 Fluval MSF made after July 2001.Please be sure that your impeller has white straight blades