Gardner Bender 25-2G2 Uni-Lok Twist-On Wire Connectors, 22-10 AWG, Electrical Wire Nut, 25 pk, Red UNIVERESAL DESIGN, handles majority of wire connection needs - Polyethylene saddle is UV-Resistant WIRE RANGE: 4 #22 (min) and 5 #12 (max) TEMPERATURE RATING: 600V max in building wire and at 1000V max in lighting, fixtures, luminaries and signs COPPER TO COPPER connections only LONG LASTING SECURE CONNECTIONS: Square wire spring grabs and holds wires for secure connections and long skirt covers stripped wires UL LISTED: Canadian and U.S. requirements (connections rated at 600V Max for building wiring and rated at 1000V Max in lighting fixtures/luminaries and signs) WIRE RANGE: 3 #20 (Min) to 5 #12 (Max) Wire connector Designed to accept a wide range of wire combinations Swept mini wings provide additional torque Square wire spring grabs and hold wires for secure connections Long skirt covers stripped wires