Thank you for viewing. Brand new, unused. Instant purchase OK. Silver Slinky, born from the collaboration between John Mayer and Ernie Ball. This unique gauge combination and proprietary Slinky formula provide a special tone and tension. Features reinforced plain strings (RPS) for enhanced tuning stability and durability, allowing for comfortable use even during long performances. All strings are precisely designed to meet John Mayer's exacting standards, expressing every nuance of your playing. Comes in a special 3-pack tin. - Brand: Ernie Ball - Model Name: Silver Slinky - Gauges: 10.5, 13.5, 17.5, 27, 37, 47 - Country of Manufacture: USA - Type: Nickel Wound