PRESTO Double Bass Strings, Nylon Tape Wound - Brand: PRESTO - Product Name: Double Bass Strings - Type: Nylon Tape Wound - Tuning: Orchestra Tuning - G.D.A.E Set Thank you for viewing. Used for about a month. They have a sound similar to gut strings, a soft tension, and are also suitable for slap bass. I purchased them directly from overseas for around 25,000 yen.