Single Silver Wound 030/J27 4th Normal Tension. D'Addario's EJ27 Classic Nylon guitar strings are great for beginners, students and professionals alike. Normal tension sets contains 3 clear nylon trebles and 3 silver-plated copper wound basses for the optimal balance of warm and projecting, long lasting tone. D'Addario offers a full range of classical guitar singles for all your replacement or customization needs. Gauge: .030 (4th Q string).