Morris 97304 Morris Products 97304 Insulated Connector, Clear, In-Line Connector Type, 2 Ports, 2/0 - 2 Wire Range,  Clear Clear Insulated Electrical Power Connectors - In-Line - With our Clear In-Line Insulated Connector, you'll see your termination is right every time Clear Insulation allows Visual Confirmation that conductor is properly inserted In-Line 6061-T6 Aluminum Connector - CU9AL Dual Rated for use with Copper and/or Aluminum wire Single Piece Clear Molded Insulation with Rugged High-Dielectric Plastisol Dipped Coating is chemical and abrasion resistant Pre-filled with Oxide Inhibitor