This appears to be a set of D'Addario Prelude 3/4 size medium tension double bass strings. - Brand: D'Addario - Model: Prelude - Size: 3/4 - Type: Set - Tension: Medium These strings were on an Oriente SV-48 purchased in June 2024. I removed them shortly after purchase because I wanted to try other strings, and have kept them in storage. They have hardly been played, but they were wound onto the pegs once, so the winding threads are frayed in places. I was told by Oriente that they are D'Addario Prelude strings. I don't think there are any particular problems, but since they are used, please understand that they are sold as-is, with no returns or claims accepted.