Pacer Heat Shrink Connectors, Closed End 18 awg to 12 awg (100/BG). Designed to join two to four wires together. Easily connect two 12 awg wires to four 18 awg wires with wire joints. Clear insulation makes for proper identification of usage easy. Perfect for use in an environment where corrosion and vibration are a concern. Often used as a safer replacement for wire nuts.