1 Micron 2.5″ x 10″ Whole House CTO Carbon Water Filter Cartridge Replacement for Under Sink Water Filter System, Dupont WFPFC8002, WFPFC9001, FXWTC, SCWH-5, WHEF-WHWC, WHCF-WHWC, AMZN-SCWH-5, 4Pack

Customers find the water filter to be of high quality, working well with reverse osmosis systems and effectively removing chlorine flavor. The filter fits standard RO unit canisters and is easy to install, with one customer noting it's a standard 2.5 x 10 inch size. While some customers say it lasts well, others report it falling apart with their existing systems.