Straight Blade Plugs: Plug Type - Locking; Rating - Amps - 20A; Rating - Volts - 120/208V 3 PhaseY; Number of Poles - 4P; Number of Wires - 5W; Ground - Grounding; NEMA - L21-20P; Cord Diameter - 0.385 - 1.150; Material - Nylon; Color - Black/White; Manufacturer Brand - Turnlok