NEMA L14-20P to NEMA 6-15/20R NEMA L14-20P, 20 Amp, 125/250 Volt, 4-prong locking male plug NEMA 6-15/20R, 15/20 Amp, 250 Volt, 3-prong female connector Nickel-plated to prevent rusting 5-year limited warranty This AC WORKS brand locking adapter [ADL1420620] is very durable with a compact design. It is NEMA L14-20P to NEMA 6-15/20R. The NEMA L14-20P is a 20 Amp, 125/250 Volt, 4-prong locking male plug. The NEMA 6-15/20R is a 15/20 Amp, 250 Volt, T-blade female connector. The product is heavy duty, compact and contains nickel-plated plugs and terminals to prevent rusting. The maximum operation power is 5000 Watts. Included with your purchase is a 5-year limited warranty. NEMA L14-20P to NEMA 6-15/20R NEMA L14-20P, 20 Amp, 125/250 Volt, 4-prong locking male plug NEMA 6-15/20R, 15/20 Amp, 250 Volt, 3-prong female connector Nickel-plated to prevent rusting 5-year limited warranty