This 2 1/2" male pipe thread x 4" diameter x 10" long filter fits the HydraMaster 4.6 CDS and the Boxxer 421 units.

Stainless steel fine mesh (100) filter has a 2" female pipe thread, Filter measures 4" in diameter, 10" in over-all length, and can be commonly found used in Prochem and Blueline waste tanks.