- Pack of 5 PMMA optical fiber rods, each 0.75mm in diameter and 20cm in length - Includes fluorescent red, green, and orange colors for maximum visibility - Designed to replace broken optical sights or experiment with new colors - Solid, flexible material with excellent light transmission - Operating temperature range: 0 to 180°F - Easy installation: place in the sight hole, heat the end, and sand to secure - Improves visibility and accuracy in laboratory equipment and portable digital microscopes - Provides superior optical performance under good lighting conditions