30A, 125/250V,Black & White, 3 Pole 4 Wire Grounding, Locking Connector, NEMA L14-30r, UL, Federal Specification, CSA, High Strength Brass Alloy Blades Resist Heat Rise, Wiring Terminal Are Color Coded & Are Back Out Ready To Wire, Amperage Voltage & NEMA Rating Are Hot Stamped On Device For Clear Identification, Matching Plug True Value #674-721, Box.