Abuse resistant thermoplastic construction. External cable clamp provides firm strain relief. Back wire terminal clamps for easy secure wiring. Triple combination head screws standard - slot/Phillips/Robertson for use in the U.S. and Canada. Clearly marked rating, NEMA configuration and standard compliances on face of plug or connector. Meets flammability requirements per UL 94. V2 rated. 30 amp, 250 volt. NEMA L6-30. Boxed.