Hayward EasyClear Filter Cover O Ring (CX400G) gruber The FC 2767 reference gives this The FC 2767 reference gives this part practical value because replacement cartridges work best when the new element matches the intended filter housing and service application closely Hydro Quip ECO 7 Topside Control Panel 4 Button [10' Cord] [Large Rectangle] [4B] [Overlay] (34 0198) is a replacement topside control panel designed for spa side operation of compatible equipment functions Supports cleaner and more dependable filter operation An O ring like this is useful because it helps maintain a cleaner seal at the lid connection