Fangrui Product Details Widely Applicable: Cx900g Filter Knob Kit Compatible With For Star Clear Plus Filters Models C751, C7512, C900, C9002(s), C1200, C12002(s) C1502, C17502(s), And C2002 Filters. Package Includes Compatible Pool Filter Parts: Cx900g (locking Knob X 1), Cx900d (guide Cone X 1), Cx900j (e-ring X 1), Cx900w (washer X 2), Cx900h (o-ring X 1), Ecx1322a (directional Vent Valve W/o-ring X 1) 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). Craftsmanship: Made Of High-quality Materials, To Aging, Resistance, And High-temperature Properties; Adopt An Electro-galvanizing Process To Increase Rust Resistance, Which Improves The Service Life And Performance Of The Products And Can Provide You With A Better Experience. : The Star Top Of The Pool Filter Got Stripped Over Time, And The Old Cone Was Gone. The New One Helps Guide The Top Onto The Threaded Rod That Holds Everything Together.