CURT twist-on wire connectors provide a firm connection between wires and make the installation process simple. With their contoured wings, they can are easy to grip and twist onto any 18-10 gauge wire. They feature a plastic construction and a 600-volt maximum capacity. This package includes 100 twist-on wire connectors., TWIST-ON WIRE CONNECTORS (18-10 WIRE GAUGE, 100-PACK) #59901 Twists over spliced wires for a long-lasting connection. Contoured wing design for a secure grip. Fits 18-10 gauge wires. Features a 600-volt maximum capacity. Notes: Includes 100 twist-on wire connectors.