This is the RME breakout cable for use with RME's PCI and PCIe line of soundcards. It provides access to the 2 independent midi ins and outs. Simply attach one end to the soundcard and the other to the midi cables and now you have 32 midi channels!
The item that came supplied with my soundcard was unfortunately broken, but Thomann sent me another without question, even insisting that they didn't need to have the the original item returned to them. A great bit of customer service.
If you need a spare RME breakout midi cable then this is the item for you.