Gamma Synthetic is an all-around performance string that offers a balance of playability durability and comfort for all playing levels and playing styles. Gamma Synthetic Gut 16g. Color(s): White Gold Black Royal Purple Teal Yellow Red. Composition: Dynalon Center Core and Outerwraps with Nylon 6. Gauge: 16g. Length: 40'. Durability: 6.71. Playability: 6.66. Type: Synthetic. Tension: 40-70 lbs.