This 12 inch long cable has a NEMA 6-20 plug on one end and a NEMA L6-30 twist-lock receptacle on the other end. Great for EVSE Upgrade units having L6-30 cords! Length, 12 inches. The 6-20 outlets are often used for motel room air conditioners. Note: Please be careful not to exceed 30 amps when using this adapter.