This is a new, unused item. It's a compatible cable for the RMx series, but it can be used with most Corsair power supplies. I've confirmed it works with an RM850. It's compatible with many power supplies, such as the RMi and RMx series. Please check the compatibility using "Type 4 - PCIe" here: https://www.corsair.com/jp/ja/s/legacy-psu-cable-compatibility *Do not use this with modular power supplies from other manufacturers. This item is in stock. If you want to ship them together, you can add one for 1280 yen. You can change to regular mail (teikeigai) for 60 yen off.