Passion, Power and Performance Nickel-Plated Steel Roundwound Dynamite Alloy Boomers remain the standard for gaming. The bright, long-lasting tone remains the power string. GHS strings are the choice of the music industry whether one wants fat, bright tone, or a bluish, warm, smooth tone. Before they leave the store, each rope is meticulously inspected by hand by quality assurance people. Calipers: 008. 011. 014. DY22. DY30. DY38.