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. 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 present for bass beginners. This present 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