Watts 7-PK RO Premier 1-Year 5-Stage Reverse Osmosis Replacement Filter Kit One-year 5-stage reverse osmosis replacement filter kit contains 1 year's worth of replacement filters Features 10-inch sediment filter, 2 10-inch GAC filters, and 6-inch polishing filter with connectors High-quality replacement filters Includes heavy-duty filter wrench Fits Watts Premier reverse osmosis systems and standard 10-inch filter housings