Blacksmith AAOT Electric MH-7; AANW-0962-7st; Coated 7-String Set for Electric Guitar; Tension: Medium Heavy; Round Wound; Winding material: Nickel Plated Steel, The Micro Carbon Shield coating, AAOT, prevents oxidation and dirt build-up on the wound strings and are designed to last even longer than the AOT strings. The perfect balance of consistency, tone, durability, and performance. ; Gauges: .009, .011, .016, .024, .032, .042, .062