Check the listing for details. DR PHR-12 Electric Guitar Strings 12-52 Pure Blues extra heavy. Condition: New. Listed at 12.99 USD. This sale is for 1 set (6 strings per set) of brand new PHR-12 Pure Blues Electric guitar strings (12-52 gauge) "extra heavy".Pure Nickel Electric Guitar Strings wound on Round Cores. The totally real Vintage string.Gauges 12-15-24-32-42-52Individually boxed... new... never opened or used!In the DR tradition of using old style construction to improve modern performance, Pure Blues electric guitar strings are designed with pure nickel wrap wire, round wound upon round cores. While this is a slow, expensive method of string making, it does produce a string acclaimed for increased sustain, vintage tone, and great low tones for playing rhythm to lead. The extra step of winding pure nickel around a round core gives the Pure Blues a punch that players say they are surprised to get in a vintage style string. International Shipping: Please use Ebay's Global Shipping Program. We promise fast shipping (usually within 1 business day). US and international orders welcome!Shipping will be handled by USPS. USPS Express Mail (overnight) is available (U.S. orders only).Thank you!