[Cord Rating]: MALE Plug 15Amp is NEMA 5-15, 125V. FEMALE Receptacle plug 30Amp is NEMA L5-30R, Rated for125V/250V max rate 3750 watts, 10/3 gauge STW wire [Twist Locking Female] 30 Amp female locking connector is molded plug with a threaded ring for weatherproof connection For use when RV is equipped with 30 AMP twist lock power inlet and needs to plug into 15 AMP power source [Why choose us] Passed UL certification, Copper wire with flame-resistant PVC outer sleeve, The ergonomics handle eliminates frustration by assisting users in safely and conveniently gripping [Warranty Service] We can guarantee 12 months money back and 24 months quality warranty. If you have any problem of using the product, please contact us & you will get timely and friendly customer service. Your suggestion is the key to our optimized product design [Cord Rating]: MALE Plug 15Amp is NEMA 5-15, 125V. FEMALE Receptacle plug 30Amp is NEMA L5-30R, Rated for125V/250V max rate 3750 watts, 10/3 gauge STW wire.