1. **Product Specifications** This is a set of 6 spring - type filter cartridges with relatively high efficiency. They are designed to capture large particles of debris and are less likely to clog rapidly. Each cartridge measures approximately 10.5 inches by 6.375 inches and is professionally calibrated. It is suitable for swimming pools right after they open or when there is more debris than usual. 2. **Applicable Models** It is suitable for a variety of Dolphin brand robotic pool cleaners, including CC Plus, Z5i, XL, C3, C4, M200, M400, M500, M5, Bio, Triton Plus (old model), Liberty, Wave 65, and Wave 90. The product number is 9991433 - R4. 3. **Filtration Principle** These spring - type filter cartridges are mainly used to intercept larger debris, allowing small debris to pass through. This is to prevent the cartridges from clogging too quickly when the pool is extremely dirty (such as when the pool opens in spring). 4. **Product Features** The plastic frame is sturdy and durable. The spring - type cartridges have a service life of about 2 - 3 years. To achieve better performance, please clean the cartridges every 4 - 6 weeks. 5. **Protection Function** This cartridge can help prevent dust and other particles from entering the cleaner's cylinder, reducing the wear and tear of the cylinder. It helps ensure that enough substances enter the cylinder, extends the service life of the engine, and provides relatively stronger power. 6. **Replacement Number** 9991433 - R4 7. **Color** Black + White 8. **Material** Plastic 9. **Package Contents** The package includes 6 pool cleaner cartridges. Only the above - mentioned items are included, and other products are not included. 10. **Precautions** Due to light reflection and different display settings, the color of the items in the picture may vary slightly from the actual product. The allowable error for size measurement is ±1 - 3 cm.