Last one I have! Black Cats! Set of 5! Since it's a set of 5, you can use strings of your preferred gauge! You can choose between ultra-low tension to low tension! Also, I think it's good to use them differently for pizzicato and slap techniques! Of course, you can also use them on a 5-string bass! I replaced the strings when playing rockabilly and bluegrass, and the low tension made it incredibly easy to play! It feels great! From Chat GPT Sensei: I had the characteristics of these strings summarized: ・Tension Quite light, making it easy to play slap for over 3 hours without getting tired. ・Tone Thick, with a deep low end. Pizzicato also blends well. ・Slap attack Easy to play, and easy to produce a popping sound. ※Does not respond to magnetic pickups. Please use acoustic sound or piezo-type pickups.