Compatible Filter-Set Double Capacity Replacement Pre-Filter Set for Ultimate Series Reverse Osmosis Water Filter System Stage 1, 2&3 by CFS

APEC Compatible FILTER-SET Double Capacity Replacement Pre-Filter Set For ULTIMATE Series Reverse Osmosis Water Filter System Stage 1, 2&3 by CFS Compatible with APEC RO-45, RO-90, RO-PH90, RO-PERM, RO-PUMP, WFS-1000 and most industry standard sized 10" x 2.5" filter housing Compatible with APEC RO-45, RO-90, RO-PH90, RO-PERM, RO-PUMP, WFS-1000 and most industry standard sized 10" x 2.5" filter housing Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.