The R2-5 Spring and R2-4 Bobbin Spring are precision-engineered spare parts imported from Taiwan, specifically designed for high-speed nylon zipper sewing machines. These springs ensure proper tension and smooth operation of the sewing mechanism, maintaining consistent stitch quality and reliable machine performance. Manufactured from high-strength spring steel, they provide excellent elasticity, durability, and long service life under continuous high-speed operation, making them essential components for industrial zipper production.