Superior performing 2" x 10" inline GAC (granular activated carbon) filter that comes in the fitting size 1/4" and 3/8". Choose what style above of connector. Very simple installation. Removes smells, tastes, and chlorine from your water. Can be used with a multitude of applications including RO systems, icemakers, dispensers, and many others. Should be replaced every year. NSF certification. American Made. If you need another size, feel free to check our store.