Wide Compatibility: This Type A or C pool filter is fully compatible with Intex Krystal Clear 530/1000/1500 GPH Pump, Flowclear 1000/1500 GPH Pump, Summer Waves SFX-1000, SFX-1500 Filter Pump, etc., helping to keep your pool clean and providing fresh pool water. Easy to Clean: Uniform and high-performance trilobal fabric makes it easier to capture and release stains, making the filter easy to clean after use. This filter effectively removes hair, leaves, dust, sediment, sand, etc. Proper Dimension: The outside diameter is 4 1/4 inch, the inner diameter is 1-15/16 inch, and the length is 8 inch. The package includes 2/4/6/8 filters, meeting your long-term use needs. Usage Note: To avoid corrosion, we suggest taking the filter out before cleaning with disinfectant. It's recommended to replace cartridges every 2 weeks to maximize your spa's performance. Superior Performance: This well-designed pool filter offers excellent filtering effects, keeping your pool clean and providing a top-notch swimming experience.