Check the listing for details. Pool Filter Knob Kit CX900DA for Hayward Star-Clear Plus Cartridge Filter Models. Condition: New. Listed at 11.90 USD. 【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】 Our Team aims to provide you the best products and services. Support 60 days returns and 12 months warranty. Please feel free to contact us if you have any question.