Unicel UHD-SR137 Replacement Filter Cartridge 137 sq. ft. | Sta-Rite Posi-Flo 135 Drains Length is measured from one

Length is measured from one end of the grid to the other (collar not included)

The CMP-exclusive "sawtooth" lip design churns the water like river rapids

Your Waterway Front Access Skimmer requires 2 cartridges for a complete service

Also known as: FG1006

Unicel UHD-SR137 Replacement Filter Cartridge 137 sq. ft. | Sta-Rite Posi-Flo 135 Drains Length is measured from oneThe Unicel UHD Series UHD SR137 is a 137 sq. ft. replacement filter cartridge precision engineered for Sta Rite Posi Flo 135 series pool filters. Built with heavy duty 4 oz. Reemay 2040 filtration media a full ounce heavier than standard 3 oz. cartridges and 216 precision formed pleats, the UHD SR137 delivers deeper dirt holding capacity and extended service intervals, keeping your water clearer between cleanings. Specifications Filter Area 137 sq.