Omnipure ® CL-10RO-T/40 inline GAC carbon water filter replacement cartridge with Coconut Shell for best taste. 1/4" (-B) or 3/8" (-C) FNPT (Female National Pipe Thread) connections. Replacement Jaco connectors and John Guest Speedfit connectors available separately for 1/4" or 3/8" tube. 25 per case, priced and sold individually. Order a case and save even more.