The Polaris CP-350-ISPB Cable Port Cone is a replacement part that takes the place of the secure removable plugs present in many Polaris pre-insulated connectors. This cone fits ports sized for 350 MCM - 12 AWG wires. Protect the interior of your Polaris pre-insulated connectors, each port of which is pre-loaded with an oxide inhibitor to ensure a low-contact resistance connection. Polaris designs connectors for use in a wide range of splicing applications, including installation in cable trays, panel boards, ducts, raceways or troughs.