15m MIDI cable. There is no manufacturer's stamp, but I believe it was made by YAMAHA. When I purchased a shoulder keyboard, I obtained another 15m MIDI cable (also listed. One end is L-shaped, the other is straight). I purchased this cable as a spare for that one. I only used it for operational checks and have not used it in live performances. 15m MIDI cables are rare, and I ordered this one from a YAMAHA store, so I remember it being made by YAMAHA. I have stored it in a dark place for a long time, so I cleaned the surface and checked its operation. I tested it with note sounds and various MIDI signals, and I believe it is working without any problems. There are no noticeable stains, but it is a used item, so please refrain from purchasing if you are sensitive to such things. Thank you.