Foam Block Pre-filter 4″ x 4″ x 6″

These Foam blocks are drilled in the centre and designed to act as a pre-filter and will extend the maintenance period of your system.

4″ x 4″ x 6″ Foam Block Pre-Filter Sponge – Drilled to an internal depth of 5″

Ideal for pre filters on fountain pumps or sump type pumps