661-6679 MagSafe-to-MagSafe 2 Converter, Retail only, US and Canada, A1407 NB-5620W Apple part number: 661-6679, Compatible models: Thunderbolt Display (27-inch), A1407, 661-6679 MagSafe-to-MagSafe 2 Converter, Retail only, US and Canada, A1407 Apple part number: 661-6679