Check the listing for details. Archery Bowstring Serving Thread Cord Line with Bow String Server Jig Tool. Condition: New with tags. Listed at 6.64 USD. Item name: Bow string Serving thread Material: 400D Nylon Thickness: 0.02" aprox 1mm Length: 131yard aprox 120m/Roll Bow string Serving thread Weight: 25g Very strong and perfect for tying the peep sight,nock. Much more durable than other type serving thread Worked great for installing cat whiskers to the bowstring Multifunctional DIY material is suitable to be used as kite string, bowstring, cobbler line and so on. Item name: Bow string Serving thread Material: 400D Nylon Thickness: 0.02" aprox 1mm Length: 131yard aprox 120m/Roll Bow string Serving thread Weight: 25g Very strong and perfect for tying the peep sight,nock. Much more durable than other type serving thread Worked great for installing cat whiskers to the bowstring Multifunctional DIY material is suitable to be used as kite string, bowstring, cobbler line and so on. 3 type Serving Jig as the picture shows you can choose #1 3 hole Serving Jig #2 Special Slot Design Server Jig #3 1 hole Serving Jig