Gardner Bender 16-084 WingGard Twist-On Wire Connectors, 22-10 AWG, Electrical Wire Nut, 100 pk, Yellow DESIGNED TO LAST: Wings are knurled for a sure grip and offset from centerline for greater twisting leverage. Square wire spring grabs and holds wires for secure connections. DESIGNED TO LAST: Square-wire zinc-plated spring instantly adjusts to the shape and size of the splice FLAME-RETARDANT TEMPERATURE RATING: Flame-retardant properties resist heat distortion up to 105C / 221F HIGH-DIELECTRIC: shell features deep skirt design to prevent exposure of bare wire - COPPER TO COPPER connections only STANDARD RATING: 600V max in building wire and at 1000V max in lighting, fixtures/luminaries and signs 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: 2 #22 (Min) to 3 #12 (Max) #22-#10 AWG Wire Range Min 2 #18AWG wires MAX 3 #12AWG wires Copper-to-Copper only UL Listed