NEMA 6-20 Extension Power Cord - 10 Foot, 20A/250V, 12/3 SJT - Iron Box Part # IBX-6153-10M FEATURING - A 6-20P Plug to 6-20R Connector. Rated for 20 Amps and 250V. HEAVY DUTY CONSTRUCTION  This fully sealed 6-20 molded extension cord provide excellent protection from oils, water, and dirt. EMERGENCY READY  Equipped with superior weatherproofing, you can count on reliable 20 amp power flow, especially in those extreme situations. Compatible with any generator equipped with a 6-20 receptacle. INDOOR AND OUTDOOR  Made for various uses both indoor and outdoor these cords are molded with heavy duty 12/3 AWG wire capable of being buried directly in the ground. THE WORLD'S LEADING POWER CORD SUPPLIER - Iron Box sells UL listed power cords with only the best components and wire.