Feature: 1. Compatibility: Specifically designed for CX900DA CX900G. Keep your equipment as perfect as new without worrying about the risk of leaks. Easy operation for convenient cartridge replacement, improving filtration efficiency, and keeping your pool equipment in optimal condition. 2. Efficient Filtration: Pool filter knob kit effectively filters tiny particles and impurities in pool water to maintain clean and clear water, providing a fresher swimming environment. 3. Easy Installation: The installation is fast and simple, remove the damaged part from the filter and install the new part. (Please confirm whether your model is suitable before buying) 4. Unique Craftsmanship: Made of ABS materials, resistant to aging, rust resistance, and high temperature resistant properties, improves the service life and performance and can provide you with a better experience. 5. Perfect Fit: The star top of the pool filter got stripped over time, and the original cone was gone. The new one helps guide the top onto the threaded rod that holds everything together. Fixed leaks from the top of the filter housing and makes cleaning the pool filter easier. Specification: Item Type: Pool Filter Knob Kit Material: ABS Weight: Approx. 433.00g / 15.27oz Locking Knob Size: Approx. 15.7x7.2cm / 6.2x2.8in . Package List: 1 Set x Pool Filter Locking Knob Parts (Total 8 Parts)