This is a set of six RCA stereo (phone) jack cables. I previously used them to connect an audio interface and a power amplifier. I used them for about five years, and then stored them unused for a long time. They haven't been used for a long period, so there isn't much damage, but there is some discoloration of the cables due to aging. The cables are marked with "REM and OYAIDE limited edition/MADE JAPAN AWG-22 Star Quad pcocc-A Wire PA-04". I believe these were made by Oyaide under commission from REM. The RCA and phone jacks are also stamped with the OYAIDE logo. I remember buying them from the distributor when I purchased a REM Fireface.