Unused item Outlet... Purchased from a store as-is. Bag is torn; please check the photos of the strings. Strings may have some kinks or coating loss. There may be other overlooked issues besides those shown in the photos, so please purchase with understanding. Not covered by warranty. Manufacturer Description D'Addario XSAPB1152 Phosphor Bronze Coated Strings 11-52 Custom Light D'Addario Acoustic Guitar Strings D'Addario's "XS Series" is a product that brings a new wind to the category of coated strings. All wound strings are coated with an ultra-thin film, and plain strings are treated with a proprietary polymer coating to protect them from substances that promote dirt and degradation. The latest coating technology and D'Addario's unique manufacturing technology merge to create an unprecedentedly innovative coated string. - Ultra-thin film coating on the entire string - 5 times the durability of non-coated strings - Strongest protective performance in D'Addario string history - Smooth feel Ultra-thin coating Utilizing an ultra-thin ePTFE film, thinner than 1/10th the thickness of a human hair, created with revolutionary new coating technology. It thoroughly protects wound strings from dirt and dust, ensuring long-lasting fresh tone. NY STEEL D'Addario's proprietary NY Steel (high-carbon steel alloy), also renowned in the NYXL and XT series strings, boasts overwhelming strength and tuning stability compared to conventional strings. FUSION TWIST The Fusion Twist process prevents tuning shifts caused by string slack. This provides excellent tuning stability and increased break resistance.