Check the listing for details. Elixir 16052 Phosphor Bronze Acoustic Guitar Strings with NANOWEB Coating, 12-53. Condition: New. Listed at 19.99 USD. The longest lasting tone night after night! Elixir® Strings Acoustic Phosphor Bronze with NANOWEB® Coating deliver distinctive phosphor bronze warmth and sparkle together with extended tone life. #1 acoustic guitar string*Only coated string brand to protect the entire string with an ultra-thin coating, keeping gunk out of the gaps between the windingsExtended Tone Life – players report their tone lasts longer than any other string, uncoated or coatedConsistent performance and tone – ready to play whenever you areSmooth feel that is easy on your fingers and enhances playabilityReduces finger squeak – good for both performance and recordingAnti-Rust Plated Plain Steel Strings resist tone-deadening corrosion, ensuring a longer life for entire setWith less hassle and expense of frequent string changes, spend more time making music*Source: MI SalesTrak® (US $ Vol)