Wonder Creature Cat Fountain Filter for 2.5L/84 oz Stainless Steel Cat Water Fountain and Fantasy Cat Fountain, Cat Fountain Replacement Filter, 4 Filters PackReplace filters pack for fantasy cat fountain and other similar cat fountain. Replace filter every 2 to 4 weeks.Best Sellers Rank: See Top 100 in Pet Supplies. Target Species: Cat. Capacity: 2.5 Liters. Brand: Wonder Creature. Material: Stainless Steel. Color: White. Country of Origin: China. : B08RXLG81G. Manufacturer: Wonder Creature. Date First Available: January 2, 2021. Item model number: W0504V-F05. Package Dimensions: 4.25 x 4.21 x 2.91 inches; 3.53 Ounces.