High-carbon steel hexagonal alloy inside material.Adopt 8% nickel alloy outside material.Strong tightness offering excellent resonates, super light tension.medium tension.Strings arounded in 6 circles placed in a plastic bag.Good feeling, high glossiness, full tone.For primary guitar players and professional performance. Model:RX17size:/inch/mm:E/010/0.25; B/013/0.33; G/017/0.43; D/026/0.66; A/036/0.91; E/046/1.17Model Number:Guitar Accessoriesguitar accessories:great bright tone:super lightcolour:Silver + greenMaterial:High carbon steel + nickel alloyPackage Contents:10 set * guitar Strings (6pcs/set)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.