HIGH COMPATIBITY: Pack of 6/12; Dimensions: 2.0x2.0x0.5Inch(LxWxH); Compatible with for 0.5/1/2.5/4 Gallon Replendish Mason Pet Fountains(Automatic Gravity Water Bowls for Dogs Cats). The cat dog water fountain replacement filter is accurate in size and easy to install. MULTIPLE FILTRATION: The large dog water bowl dispenser filter is saturated filled with activated carbon and and non-woven fabric, fully isolate cat hair and food residue, remove impurities and particle, filter heavy metals and odors, soften tap water and obtain clean and fresh water. PROTECT YOUR PET: This water dispenser filter for dogs cats is made of high-quality materials, safe and odorless. It plays an important role in improving water quality and protecting the health of pets' urinary system to keep your pet healthy. REGULAR REPLACEMENT: In order to ensure the health of your pets, please maintain the habit of changing the dog cat water filter replacement every half month. Compatible with for petmate replendish filter for gravity water fountain bowl filters/compatible with for petmate dog water bowl filter replacement/compatible with for mason charcoal replacement filters for automatic pets dog water dispenser cat waterer. Quantity:12PCS/6PCS Colour:White Material:Carbon Fiber Package Contents: 12 * Pet Water Fountain Filters / 6 * Pet Water Fountain Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.