Vinyl Insulated Step Down Butt Connector 16-14 gauge to 22-18 gaugePolyvinyl insulatedFor secure and reliable connection of 2 wires with different sizesManufactured from electrolytic copper seamless tubeElectro tin plated for copper partsButted seamEase of wire insertion with beveled mouth entry and flared barrel mouthWire stop for wire positioning built on the middle of the butt connectorsWire range indicated by industry standard color coding