high-quality strings for double bass. Material:High-carbon steel core, excellent toughness and even tension. Nickel chromium alloy wound and nickel-plated ball end. and warm bass sound. Perfect string replacement for bass lovers. Length: 1st-G--158.6cm/ 62.4in; 2nd-D--164cm/ 64.6in; 3rd-A--169cm/ 66.5in; 4th-E--157cm/ 61.8in Diameter: 1st-G--1mm; 2nd-D--1.67mm; 3rd-A--2.1mm; 4th-E--2.75mm Colour:As Shown Material:Steel+Nichrome Alloy Package Contents: 1 set X Strings (4 pcs Strings) 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.