Suggested Retail: $16.99. Tomxcute Cat Water Fountain Filters for 108oz/3.2L and 135oz/4.0L Adjustable Water Flow Pet Water Fountain - This set of 8 filters and 8 sponges is compatible with 108oz/3.2L and 135oz/4.0L TOMXCUTE Stainless Steel Cat Water Fountains. The filters provide three-layer filtration: blocking hair and debris, removing residual heavy metals, and ensuring healthier, high-quality flowing water. It's recommended to replace the carbon filter every 4 weeks (or every 2 weeks in hot weather) and the foam filter every two months to keep the water fresh. Brand: Tomxcute Model: BE-0004-8+8 -- LOT STICKER: TCE-BOX-BOXTCE00631-ITEM-2701773d___LPNPMAB0811757 -- SIZES ARE ESTIMATED. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.