Feature: 400D/3/0.020 Breaking Strength 34 lbs Very strong and great for strapping peepers, nocks. for attaching whiskers to bowstrings More than other types of service lines The versatile DIY material is suitable for kite strings, bowstrings, shoemaker's strings, and more. Specification: Product name: Bow string Serving thread Model: 400D/3/0.020 Material: 400D Nylon Weight: about 26 grams Thickness: 0.02 inches/approx. 1mm Length: 131 yards, about 120m Package Included: *Bow string Serving thread Note: . The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 【High Strength Material】Made from 400D nylon, this serving thread boasts a breaking strength of 34 lbs, ensuring durability for various applications. 【Versatile Usage】Perfect for crafting bowstrings, kite strings, and shoemaker's strings, making it an essential item for DIY enthusiasts. 【Optimal Thickness】With a thickness of 0.02 inches (approx. 1mm), it provides the right balance between flexibility and sturdiness for effective performance. 【Generous Length】Each spool contains 120m (131 yards) of thread, offering ample length for multiple projects without the need for frequent replacements. 【Ideal for Bow Enthusiasts】This bowstring serving thread is designed specifically for bow protection, making it a must-have accessory for archers and bow makers.