Watertight Locking Plug, Connection Orientation Straight, Current Rating 20 A, Housing Color Black, Housing Material Thermoplastic Elastomer, NEMA Plug Configuration L21-20P, Number of Blades 5, Number of Poles 4, Phase Three, Polarized Yes, Resistance Properties Chemical Resistant, Impact Resistant, Watertight, Voltage Rating 120/208V AC, Wire Connection Type Screw Terminals, Wiring Style Standard, For Maximum Cable Diameter 0.875 in, For Minimum Cable Diameter 0.375 in, Grade Industrial