Features: brand new and high quality Full set of high-quality aluminum-magnesium alloy materials, light weight and low density, fully meet the strong pressure of cello strings, clear and warm sound, easy to perform or practice. Nickel-plated round for head, the surface is treated and coated with a protective film, the appearance is bright, not easy to rust, and can effectively improve the sound quality. After mature string making process, every detail is made with care, so the sound quality is sweet, the occurrence is big, it is a mature connection playing string. Each piece is rust-proof and moisture-proof, which can effectively prevent the strings from oxidation and have a longer service life. Strong, durable and long lasting. A great option for cello replacements. Suitable for Cello 4/4. Specifications: Material:Aluminum-magnesium Alloy Diameter1:Approx.0.17cm/0.06inches Diameter2:Approx.0.13cm/0.05inches Diameter3:Approx.0.08cm/0.03inches Diameter4:Approx.0.07cm/0.02inches Length:110cm/43.3inches Package Includes: 4x Cello Strings note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.