Silicone construction provides lightweight, durable, and flexible protection for fishing gear, with lasting performance. Center hole features a copper ring for enhanced wear resistance and reduced line frication at the entry point. Bright color improves visibility in water and cluttered environments for quick identification. concentricity ensures a smooth, centered bore for a secure grip and better line protection. Available in multiple inner diameters to fit common line sizes and is compatible with most monofilament and fluorocarbon lines. Use scenarios Protect line as it passes through rod guides during casting in freshwater rigs. Ideal for lightweight spinning or finesse setups to reduce abrasion on leaders and lures. Helpful in fly fishing to guide tippet through guides with less fraying and breakage. Performance benefits: longer service life, easier handling, and reliable protection of line during casting, retrieval, and general use.