The R3-43 Upper Thread Guide Assembly and Rod is an original imported spare part specifically designed for Xingrui high-speed nylon zipper sewing machines. This component accurately guides the upper thread, ensuring precise thread alignment, smooth feeding, and consistent stitch quality during the sewing process. Made from high-strength materials, it offers excellent durability, stability, and long service life under continuous high-speed operation, making it a critical part for industrial zipper production.