Twist-On Wire Connector, (2) #18 Awg Conductor Size, (3) #12 Awg Conductor Size, Copper Conductor Material, Yellow Insulation Color, +221 °F Operating Temperature, 23/32 In Overall Width, 1-1/32 In Overall Height, 300 V;600 V (Building Wire);1000 V (Lighting Fixture;Luminaries;Sign), 20 LB