is fit most gravity-fed water filter systems, The 4-filter pack is a compatible replacement for Travel, Big, Royal, Imperial, Light, Crown ,Boroux Series, Traveler, Nomad, King, Big Series, Doulton Ceramic. black replacement filters feature premium NSF42 coconut shel activated carbon ,to effectively filter odor,color,chlorine and other contaminants.Ensuring pristine, great-tasting water that is perfect for you and your family to enjoy with peace of mind. Water Filter recommend to replace the countertop purification gravity elements per 6000 gallons, subject to your home water conditions. Further before installing, we request you to rinse the filter interior with tap water until the water is clean, for a better performance. Affordable and Cost-effetive:You can enjoy the same level of filtration and performance as brand-name filtersbenefits of high-quality water filtration while keeping costs reasonable and cost-effective. Color: Black Material: Metal Package Contents: 4 x water filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.