Check the listing for details. CX900DA Pool Filter Knob Kit for Hayward Star-Clear Plus Cartridge Filter Models. Condition: New. Listed at 11.90 USD. CX900DA Pool Filter Knob Kit Fits for Hayward Star-Clear Plus Cartridge Filter Models C751 C900 C9002 C1200 C12002 C12002S, Replace for CX900D/CX900H/CX900W/C900J Perfect Compatibility：This CX900DA Pool Filter Knob Kit is designed to compatible with Hayward Star-Clear Plus Cartridge Filter, for Models C751, C900, C9002(S), C1200, C12002(S), C1502, C17502(S), C2002, C7512. Please make sure before purchasing. Replace：Replacement for CX900DA Knob Kit (Includes CX900D Guide Cone, CX900H O-ring, CX900W Washers, C900J E-clip) . Professional manufacture, meet or exceed for OEM specification. Solve Leak Issue：The CX900DA Pool Filter Locking Knob Kit is used to replace the old knob part and repair your filter. It helps guide the top to the threaded rod that holds everything together, help solve the leak issue, recover and enhance the high performance of your pool filter. Reliable Quality：Made of premium steel and plastic for duability and long lifespan. Features good rustproof performance, high wear and corrosion resistance, high temperature resistance. High quality rubber o-ring for better sealing, anti-leak. Easy to Replace：Excellent pool filter knob kit replacement. Just remove the top filter cover and old parts, then install the new parts, easy and quick installation. Minutes installation, save your time and money. 100% Satisfaction Guarantee：Your satisfaction is our priority. We strive to give our customers excellent service. All our products support 60-Day money-back guarantee, 12-Month warranty for quality-related issues. Simply return it for your warranty.