[WATER FOUNTAIN FILTERS] Set includes 6-pack of high-quality pet fountain replacement filters and 12-pack of replacement filter sponges. [PERFECT COMPATIBILITY] This replacement filter is compatible with 67oz/2L automatic pet water fountain models. [MULTIPLE FILTRATION] The four-layer filtration system includes outer shell, ion exchange resin, coconut shell activated carbon, and cotton. It helps capture hair and debris, reduce odors, remove heavy metals, and purify water for pets. [EASY TO REPLACE] The filter and sponge are easy to remove and install. When replacing, ensure the correct orientation of the filter elements. Refer to product images for guidance. It is recommended to replace the filter and sponge every 3-4 weeks for optimal performance. More frequent changes may be needed with multiple pets. [WARM TIPS] Before use, soak the filter in clean water for 15-20 minutes, then rinse thoroughly under running water to maintain clean and fresh water. Material: Non-woven fabric, ABS Color: White Package Contents: 6 x Filter Elements 12 x Filter Cotton Note: Light reflection and display settings may cause slight color variations between the image and actual item. Measurement tolerance is +/- 1-3 cm.