Abuse resistant thermoplastic construction Back wire Dead-Front design External cable clamp provides firm strain relief Back wire terminal clamps for easy secure wiring Nylon plugs and connectors have slot/Phillips combination head screws Clearly marked rating, NEMA configuration and standard compliance on face of plug or connector NEMA configuration and standard compliance on face of plug or connector 15 amp, 125 volt .250 in.-.690 in. cord diameter