The Drinkwell 360 Replacement Filters keep water clean & fresh and are designed to fit Drinkwell 360 Fountains. The cylindrical filter features a pull-tab for easy placement and removal. The filter contains granulated carbon for extended filtration and the duo density polyester pad captures debris. Filters should be replaced every 2 weeks. This is the same as SKU PAC00-13712.Save with a subscription! Get fountain filters automatically and conveniently delivered right to your door when you need them. You'll receive free shipping with FedEx® Ground and a 5% discount off the price of the filters. Choose when you need your first order and how often you want to receive your next shipments. We recommend choosing a 3-month frequency for these filters. You can easily change your shipment and payment settings by logging in to your account. You can choose to cancel your subscription at any time. You and your pet will love the no-hassle convenience of having filters automatically shipped to you whenever you need them.