32 replacement filters for drinking fountains, water dispensers, cat fountains Description: 【Suitable for】The size of the replacement filter is 7.6 x 4.3 cm. The inner diameter of the sponge is 6 cm, please measure the size of the filter housing before ordering. 【Safety】The replacement filter can effectively isolate impurities such as hair in the water, enable safe operation of the drinking fountain, improve water quality and protect the safety of pets. 【Recommendation】Replace the carbon filter every four weeks. Replace the sponge filter every two months. Soak the filter in a clean container for 5 minutes. Specification: Material: Polyurethane Size: As shown Color: Black, White Package included: 32pcs [16pcs carbon filters + 16pcs foam filters]