Brand: Gosen Material: Nylon Sea Island Composite Yarn Gauge: 1.29mm (16GA.) Length: 12M x 1 set Color: Natural Durability: 8 Repulsion: 8 Soft Feel: 8 Spin: 8 Tension: 50-60 lbs This string uses a unique sea island structure in its winding. Designed for competitive players. I purchased this as a non-packaged item, but I'm selling it because I switched to a different string and didn't use it.