Fluval Ceramic shaft assembly for impellers with curved fan blades only. (for models 304 & 404) Old Style.
Hagen Impeller Shaft for Fluval 304 and 404 models manufactured BEFORE July 2001 require (Old Style) impeller Shaft!
For Fluval 304 and 404
With Rubber support For impellers
For impellers with CURVED fan blades only