MagiDeal Stainless Steel Strings 1st-6th(.010-.047) 6pcs Acoustic Guitar Strings A101 Brand New 1set Acoustic Guitar String The String Made by Coated Copper Alloy Wound Suit for Generic Acoustic Guitar Material: Steel Wire String Diameter(6 strings): E=0.30mm B=0.41mm G=0.61mm D=0.81mm A=1.07mm E=1.35mm