30' Coiled Straight/Straight Instrument Cable Black. Ernie Ball Instrument Cables feature a high-end design made with superior components that are built to last. Instrument Cables transmit a clean transparent signal that is superbly quiet while accurately and faithfully delivering all the frequencies your instrument produces. These cables feature a dual-shielded, dual-conductor design and custom shell casing resulting in a tangle-resistant cable with clear sound, low handling noise, and roadworthy durability. 99.99% oxygen-free copper to resist corrosion. Flexible, tangle resistant construction. Dual-shielded, dual-conductor design for durability and low noise. Voiced for a natural, transparent sound with balanced frequency response. Durable shell casing for lasting performance.