Features: There are sizes about each strings, so you will not be confused about installation place. It features a simple and not damage installation, therefore no need to use any special tools. With good performances, so it can be a nice choice for replacing the worn or damaged strings. This Viola strings features a good tension, you can use it to for play a clear and pleasant sound. Steel core nickel chromium wound, you can use it for a long time, not easy to break and worn out. Specifications: Material: Nickel Chromium Wound Color: As The Picture Shows Package Weight: approx.21g Diameter: 0.23mm, 0.28mm, 0.41mm, 0.61mm (More Size Detail, Please See Photo.) Package Includes: Set of 4Pcs Viola String note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!