Features: Made of copper and steel, , anti-rust, very solid and , ensure a long time use. Delicate workmanship with texture, make great tone, give you great playing experience. Great for beginners and experienced guitarists, suitable for most sizes of guitar. Beautiful colors, replacement and decoration for your guitar. An excellent gift for your family or anyone who loves guitar and music. Specifications: Condition: 100% Material: Copper + Steel Weight: Approx. 36g / 1.3oz Color: As Pictures Shown Quantity: 12 pcs Type E-1 E-2 B-3 B-4 G-5W G-6 D-7W D-8 A-9W A-10 E-11W E-12W Diametermm / in 0.252 / 0.010 0.252 / 0.010 0.36 / 0.014 0.36 / 0.014 0.58 / 0.023 0.252 / 0.010 0.76 / 0.030 0.36 / 0.014 0.96 / 0.038 0.46 / 0.018 1.19 / 0.047 0.69 / 0.027 Package list:  12 * Guitar StringE-1st: E-1, E-2, B-2nd: B-3, B-4, G-3rd: G-5, G-6, D-4th: D-7, D-8, A-5th: A-9, A-10, E-6th: E-11, E-12 The guitar is not included.