Hubbell® Twist-Lock® Insulgrip® Connector Body, Grounding Shrouded Watertight, 120/208 VAC, 30 A, 3 hp, 4 Pole, 5 Wires, NEMA 4/4X/12/L21-30R, Grade: Industrial, IP66 Enclosure, 0.35 to 1.15 in Cord Dia, -40 to 75 deg C, Screw Terminal, PBT, Black/White, 2.75 in Dia x 4.4 in L