[Applicable Model]: This Cat Fountain Filter Replacement is fit well with WF050 & WF060 parent fountains.[Triple Filtration]: It is easy to get the healthy drinking water for pets with this Cat Water Fountain Filter,through the triple filtration of Biochemical Cotton & Activated Carbon & Ion Exchange Resin, which can effectively remove impurities & odors in the water and soften the hard water.[Rinse before Use]: Please rinse the Pet Water Fountain Filter directly under water before use WITHOUT any detergent.[Frequency of Replacement]: Please replace the Cat Water Fountain Filters within 2~4 weeks, depending on the number of pets in use.[8 Pieces in 1 Set]: You will get 8 pieces of Pet Fountain Filter Replacement, which use time is usually up to 2 quarter.Colour:Black+whiteMaterial:spongeSize:12 x 2.7 x 2cmPackage Contents:8 x Drink fountain spongesOnly the above package content, other products are not included.Note: Light shooting 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.