Welcome to our store! 1. Crafted from 1600D ultra-high molecular weight polyethylene fiber for exceptional toughness. 2. Features low ductility, strong tensile strength, wear resistance, and ultra-lightweight design. 3. Suitable for making recurve bowstrings, long bowstrings, and compound bowstrings. 4. Total length is approximately 360 feet/110 meters, with a strength of 45.5 kg and 1% stretch. 5. Available in 4 different color combinations to suit your preference. Item Type: Bow Serving Thread Material: UPE 1600D Single Strand Length: Approx. 110 m / 4330.7 inches String Material Single Strand Diameter: Approx. 0.9 mm / 0.04 inches Spool Height: Approx. 11.5 cm / 4.5 inches Spool Base Width: Approx. 3.5 cm / 1.4 inches Top Spool Width: Approx. 2 cm / 0.8 inches 1 x Bow Serving Thread Guaranteed Satisfaction: Customer satisfaction is our top priority. If you encounter any product issues, please contact the seller immediately. We are committed to providing satisfactory after-sales service.