Features:
Hexagonal carbon steel core is used for inner wire.Antirust coating treatment.
Adopt 75% bronze and 25% phosphor outside material. 
Strong tightness offering excellent resonates, extra light tension.
Strings arounded in 6 circles placed in a plastic bag, suitable for acoustic guitar..
Good feeling, high glossiness, full tone.
Strong durability, clearly timbre and feeling comfortable.
 
Specifications:
Model:TX620/TX630/TX640
Inner Material: Hexagonal Carbon Steel
Outer Material: 75/25 Green Phosphor Copper Wire
Package size: 12* 11 * 1cm / 4.7 * 4.3 * 0.4in
Package weight: 35 g / 1.2oz
 
Package List:
1Sets Acoustic Guitar Strings

Note:
The instrument showed in the picture is not included.