Product overview Replacement CX900G locking knobs and CX900DA knob kit, 6 pieces total. Designed to worn, cracked, or missing knobs on compatible cartridge filter and separation tank models to restore secure closure and normal operation. Key benefits Restores secure locking: Replaces damaged knobs to ensure filter housing and separation tank lids stay properly fastened during operation. Exactfit compatibility: Made for compatibility with Star Clear Plus cartridge filter and separation tank models C1200, C12002, C12002S, C751, C900, and C9002. Convenient kit: Six pieces included so you have spare knobs for multiple access points or future maintenance. Easy installation: Designed for straightforward replacement to minimize downtime during or service. What this kit does for you Solves common problems such as stripped threads, broken knob ears, and lost knobs that prevent a tight seal or make lid removal difficult. Helps maintain proper filter operation by enabling a secure closure between lid and tank. Reduces the need for full housing replacement by providing a targeted, cost effective option. Important attributes Function: Replacement locking knobs and knob kit for cartridge filter and separation tank lids. Compatibility: Compatible with Star Clear Plus cartridge filter and separation tank models C1200, C12002, C12002S, C751, C900, and C9002. Quantity: 6 pieces per kit to cover multiple knobs or spare replacements. Performance: Restores fastening function so the filter lid can be securely tightened and later removed for service. Typical use scenarios Routine maintenance: worn knobs during annual filter service to ensure lids can be opened and closed reliably for cartridge cleaning or replacement. Seasonal opening or closing: Swap in knobs when preparing the pool for the season to prevent leaks or loose lids during operation. after damage: Quickly broken or missing knobs caused by accidental impact or aging plastic to avoid full housing replacement. What to expect A straightforward replacement kit that provides the knobs to restore the locking function on compatible filter and separation tank lids. Compatibilityfocused design to fit the listed models without modification. Multiple pieces included to support immediate repairs and future needs. Compatibility reminder Compatible with Star Clear Plus cartridge filter and separation tank models C1200, C12002, C12002S, C751, C900, and C9002. Confirm your model before ordering to ensure a proper fit.