Thank you for viewing! This is the standard guitar pedal adapter, the Boss PSA-100. I bought a lot of these adapters, fantasizing about playing with a lot of guitar pedals lined up like an alternative rock musician. However, I mostly just play at home, and connecting effects pedals is a hassle, so I rarely used them and they were just sitting on a shelf. Therefore, they are in near-new condition. For those who love effects pedals, please make good use of them.