2 Pack - New Spa Filter Cartridges Fit: UNICEL 6CH-47RA--FILBUR FC-0315M--Pleatco PTL47W-P4-M Outside Diameter: 6 Length: 8 1/2 Top Opening: Handle Bottom Opening: 1 1/2 Media Weight - 3 oz. SQ FT Media - 47' sqft Unicel  6CH-47 (6CH47) Filbur - FC-0315 (FC 0315) Pleatco  PTL47W-P4 (PTL47WP4)