Check the listing for details. D'Addario EFT15 Flat Tops 10-47 Phosphor Bronze X Light Acoustic Guitar Strings. Condition: New. Listed at 16.79 USD. D'Addario EFT15 Flat Top Extra Light Phosphor Bronze Acoustic Guitar Strings (10-47) D'Addario's lightest gauge of Flat Top acoustic strings, EFT15s are ideal for beginners or any player that prefers a softer tone and easy bending.EFT15 Flat Top strings combine D'Addario's popular extra-light gauging with an exclusive precision polishing process for a smoother, quieter playing surface. Great for recording or slide playing. D'Addario Flat Tops are round wound, then precision ground, leaving the outer surface smooth and "semi-flat." This produces a smooth, flattened playing surface, but does not sacrifice the superb tone and sustain associated with phosphor bronze strings. Flat Tops greatly reduce finger noise and are excellent for recording and flat-picking.D'Addario's lightest gauge Flat Top acoustic guitar string set, known for its superb, long-lasting tone and playing easePreferred for its warm, bright, and well balanced acoustic toneEnvironmentally friendly, corrosion resistant packaging for strings that are always freshMade in the U.S.A. for the highest quality and performanceString Gauges: Plain Steel .010, .014, Phosphor Bronze Wound .023, .030, .039, .047