[Applicable Model]: This Cat Fountain Filter Replacement is fit well with WF050 & WF060 transparent 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+white Material:sponge Size:12 x 27 x 2cm Package Contents: 8 x Drink fountain sponges Only the above package content, other products are not included. Note: Light 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.