Pre-loved power plug and connector M1/F1 is the flagship model of Oyaide that is made in Japan. The powerful, dynamic, and highly-sophisticated sound provided by the M1/F1 is unmistakable and unforgettable for everyone. Some specs:Contacts: Beryllium copperPlating: Platimum (0.5 micron) + Palladium(0.3 micron)Body: POM (Polyacetal resin) + Alumium Monocoque Shellinstall cable O.D.: min 6.5mm max 17.0mmMaximam wire gauge: AWG10(5.5sq)Rated V/A: M1 : 125V・15A E F1 : 125V / 15A, 250V / 16A E, CE For full description, please visit the oyaide website: http://www.oyaide.com/ENGLISH/AUDIO/products_category/power_plugs_iec_connectors/pg475.html This set was purchased at $700. I am now letting go at $450 only. Hurry up, do not miss!