What is this? The sight optic fiber is used for replacement of the broken sight or for trying a new color. What will I get? The fiber optic cable PMMA brightness material, we provide here, is in the size of: Type: Solid Material: PMMA Fiber Diameter: 1 mm / 0.04 inch Fiber Length: 30 cm /11.81 inch Operation Temperature: 0 to 180 Fahrenheit Color: Fluorescence Green In the package of: 2 x Fiber Optic Rods Is there any advantages of the product? The replacement optical fiber offer a brightness color for your sight, with good optical conductivity and flexible enough. How to use it? Put the fiber cable into the sight hole, then heating the end to fixed, final sand the end to finish. What should I notice? The principle of the optical fiber is the good light guiding, only in the light, it will offer a good optic transfer performance.