Lee's Quick and Easy Disposable Cartridge, Small, 2-Pack Dual Pocket-inch Disposable Cartridge has Dacron floss activated carbon and zeolite The Dual Pocket feature forces water to penetrate through the carbon and zeolite providing the most efficient filtration 2 Per poly bag 2 Per poly bag The -inch Dual Pocket-inch feature forces water to penetrate through the carbon and zeolite providing the most efficient filtration