Meccanixity Fiber Optic Rods Pmma 0.75Mmx25Cm For Sight Filament Green 1 Set What is this? What will I get? In the package of: 5 x Fiber Optic Rods Are there any advantages of the product? How to use it? What should I notice? The fiber optic bar is used for replacement of the broken sight or for trying a new color. Color: Fluorescence Green; Fiber Diameter: 0.75 mm/0.03 inch; Fiber Length: 25 cm/10 inch; Operation Temperature: 0 to 180 Fahrenheit; 1 Set - 5 x Green Fiber Optic Rods. The replacement optical fiber offer a brightness color for your sight, with good optical conductivity and flexible enough. Put the fiber cable into the sight hole, then heating the end to fixed, final sand the end to finish. The principle of the optical fiber is the good light guiding, only in the light, it will offer a good optic transfer performance.