Hubbell Wiring Device-Kellems Twist-Lock, HBL26W48, Locking Plug, Non-Shrouded Watertight, 250 V AC, 20 A, 2 hp, 2 Pole, 3 Wires, NEMA L6-20P NEMA Rating, Industrial Grade, NEMA 4/4X/6/6P/12/IP65/IP66/IP67 Enclosure, 3/8 to 7/8 in Diameter Cord, -40 to 60 deg C, Screw Terminal, Thermoplastic Elastomer, Yellow, 2.51 in Dia X 3.96 in L Dimensions