The guitar strings are made of stainless steel inside and coated for durability. The voice was clear and bright. Compatible with 4 string electric bass. The texture is extraordinary, and the sound is crisp and clear. The strings have an extraordinary texture. Popular with many rock, metal, music, country and jazz musicians. Features -Color:Assorted Color -Material:Nickel alloy, stainless steel -Size:120.00X0.11X0.11cm/47.16X0.03X0.03in -Size:120.00X0.14X0.14cm/47.16X0.05X0.05in -Size:120.00X0.2X0.2cm/47.16X0.07X0.07in -Size:120.00X0.25X0.25cm/47.16X0.10X0.10in - Stainless steel wire core, nickel alloy fully automatic winding, durable. Can accompany you longer. - The surface is smooth and won't cut your hands, providing you with the perfect music experience. - Suitable for 4 string electric bass, four colors: blue, rose, yellow, green, more cool appearance, to meet your needs. - Lightweight and portable, easy to store and use, a great bass beginners. This gift is very practical. - Clear tone, suitable for different groups of people to use, to provide you with excellent music sound services. Package list: 1 x 1.16mm guitar string 1 x 1.44mm guitar string 1 x 2mm guitar string 1 x 2.54mm guitar string