Petmate Replendish Charcoal Replacement Filters REPLACEMENT FOR REPLENDISH WATERER: Charcoal filter is a direct replacement for the Replendish and Mason Gravity Waterers CAPTURES SEDIMENT: The Petmate filter replacement's unique external polyester material captures sediment to keep water clean CONTROLS CHLORINE AND ODOR: The Petmate water filter's internal charcoal element controls chlorine levels and odor GREAT TASTING, HEALTHY WATER FOR PETS: Pet bowl water filter removes impurities and provides clean, fresh water to keep pets healthy LASTS UP TO 8 WEEKS: The Petmate charcoal filters last from 6 to 8 weeks for longer-lasting filtering FILTER STRAP INCLUDED: Filter strap helps pet parents securely fit the filter replacement into the gravity water bowl 3-COUNT PACK: The Petmate replendish charcoal replacement filters are offered in 3-packs to conveniently keep extra filters on hand