Usage Tips:Outstanding color, and not easy to break; rigid core nickel alloy winding sound is loud and not noisy; beautiful, rust-proof, , steel-nickel alloy winding, comfortable and smooth, longer life; good oxidation barrier. The production is a combination of sophisticated traditional technique and modern automatic machinery These strings are melodious, comfortable to play with, and affordable, a good choice for music lovers 1 set of 4 double bass strings steel core offers superior strength and durability Pitches of one set strings: 1th, 2rd, 3nd, 4st Specifications: Fit for: 3/4 4/4 1/2 1/4 1/8 double bass 1th: Diameter: 1.04mm, 2rd Diameter: 1.6mm, 3nd: Diameter: 1.92mm, 4st: Diameter: 2.4mm Colour:As shown Material:steel core Package Contents: 3 Set x Double Bass Strings (1th, 2rd, 3nd, 4st) Only the above package content, other products are not included. Note: Light reflection 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.