SwimSpaEPRSet15 – Master Spa Swim Spas EPR Filter Set – (1) X268549 – PMA-R4 – and (1) X268532 – PMA-EPR – Eco Pur Charge Master Core Technology Mineral Filter and (2) X268542 – PWW50P3. This sale is for. (1) X268549 – PMA-R4 Filter aka “OUTER FRONT ACCESS LOCKING FILTER”. (1) X268532 – PMA-EPR and. (2) X268542 – PWW50P3. Master Spa 30 SF Filter with 1.5 Male SAE Thread & EPR Insert. Master Spas Part#: X268549 PMA-R4. Diameter: 6.0 inches (15.24 cm). Length: 7.25 inches (18.415 cm). Total Length (including top and bottom): 9.0 inches (22.86 cm). Note: This part is only available through Master Spas and their affiliates. Master Spas Part#: X268532 PMA-EPR. Handle Diameter: 4.0625 inches (10.31875 cm). Diameter: 1.875 inches (4.7625 cm). Length: 7.0 inches (17.78 cm). Length with Handle: 8.0 inches (20.32 cm). Bottom Hole: 2 inch (5.08 cm) MBT style. Weight: 5.8 oz. Note: These new filters are not available with Microban. Master Spas Part#: X268542 PWW50P3. Length: 7.625 inches (19.3675 cm). Bottom Hole: 1.75 inches (4.445 cm). Material Area: 40 Sq feet (Approximately 3 Sq m). Unicel 6CH-940RA, Filbur FC-0359M, X268905.