Features •Five color-coded models cover common construction wire ranges •Ribbed cap provides positive grip for fast, easy installation •Fixed, square-wire spring threads itself creating a secure pressure grip •Deep, wide-throated skirt protects against flash-over and turned-back strands for maximum dielectric protection •Tough, UL 94V-2 flame-retardant shell rated at 105°C (221°F) •UL 486C Listed and CSA 22.2 #188 Certified