PetSafe Drinkwell Premium Replacement Carbon Filters, coconut shell charcoal, Black/White, Pack of 12 Certified Fit for Outdoor, Everflow, Multi-Tier, Original, Platinum, Zen & Mini, 50% More Carbon.

FRESH WATER: Activated carbon water filter made from coconut shells removes bad tastes and odors from water, keeping it fresh; change every 2-4 weeks to maintain water freshness 50% MORE CARBON: PetSafe Drinkwell branded filters contain 50% more carbon than generic brands for better and longer-lasting filtration PRODUCT SUPPORT: PetSafe brand's US-based Customer Care experts will be glad to help; call Monday through Saturday at 1-800-845-3274 EXPERIENCE: PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.