Features: The locking knob, pool filter knob set provide convenient operation and efficient filter replacement for your pool. Designed with quality materials, the locking knob, pool filter knob set ensures performances and stability for your pool filtration system. Suitable for pool owners and maintenance professionals, the locking knob, pool filter knob set simplifies filter replacement and maintenance tasks. Perfect for various indoor swimming pools, the locking knob, pool filter knob set helps maintain clean and clear water for a refreshing swim. Enjoy a refreshing swim in hotels or resorts with the locking knob, pool filter knob set, ensuring optimal water quality for a pleasant swimming experience. Specifications: Material: Plastic Models: CX900G, CX900DA, CX900D, CX900H, C900J, CX900F ECX1322A Applicable Models: Suitable for C751, C900, C9002, C1200, C12002, C12002S, C1502 Size: As Picture Shows Package Includes: 1 Set Locking Knob note: Please allow 1-2cm errors due to manual measurement. Please make sure you donot mind before order. Due to the differences between different monitors, the picture may not reflect the actual color from the item.