Leviton 16D33-W 16 Series Taper Nose, Female Plug, Contact and Insulator, Cam-Type, Detachable, Double Set Screw Termination, White (Old Model) Santoprene Insulator is Shatter and Crack Proof Color-Coded Insulators for Easy Phase Identification Intermateable and compatible with competitive cam-type products: can be retrofitted to existing locations and power distribution systems Hard Thermoplastic Screw Provides Strength and Durability Sleeve Material: Santroprene TPV