Conntek 1F515520, 1-ft. 15-Amp to 20-Amp Power Adapter Cord/Space Saver 15 Amp to 20 Amp Adapter (NEMA 5-15P to NEMA 5-15/20R) 12 AWG, 3-wire, good for 20 amps Cable jacket is STW Reduces clutter on power strips and outlets due to bulky charger packs Certified and listed by Underwriters Laboratories