Cobalt provides a stronger magnetic relationship between pickups and strings than any other alloy previously available. Cobalt Slinkys are also soft and silky to the touch, making string bending a breeze.The item "10 x Ernie Ball 2723 Cobalt Super Slinky Electric Guitar Strings 9-42" is in sale since Monday, January 25, 2016. This item is in the category "Musical Instruments\Guitars & Basses\Parts & Accessories\Strings". The seller is "the_music_shop_1934" and is located in Loxton, South Australia. This item can be shipped to Australia, to United States, to United Kingdom, to Japan, to Canada, to Germany, to Hong Kong, to New Zealand.