This auction is for a BRAND NEW AquaStop Valve Replacement part for the Fluval 104, 204, 304, 404 and 105, 205, 305 and 405 Filters with ribbed hosing.    If the hosing on your fluval has ribs on it, this AquaStop will fit.  This one is silver and black as shown in the picture.  This color replaces the blue one used on the "04" series.

Part # A-20060

This part is manufactured by Hagen (makers of the Fluval).

Thank you for looking.