Optic fiber is a kind of optical transmission material, light transmission through optical fiber can form a new light effect. Optical fiber itself is not charged and does not light, so it is safe for people to use. It is soft and , easy to create whatever shape or design you want. Our optic fiber is super bright fiber, high brightness and light transmission distance reaches 1-3m (depending on light color or light source power), great for short distance high-brightness products. Perfect for different kinds of decoration. widely used to make curtain, screen, cinema, ceiling sky decoration. Product Dimension: 150/200/300Pcs x 0.75mm diameter x 2m long. Specification: Material: Plastic Diameter of each fiber: Approx. 0.75mm/0.03 inch Quantity of fiber cables included: 150/200/300 Pieces Length of each fiber cable: Approx. 2m/78.74 inch Operation Temperature: -20~100 Recommended Storage Temperature: 10-50 Max Bending RadiusApprox. 3.75mm/0.15 inch Transmit Light Wavelength: Approx. 350-780nm Package Includes: 1 Roll 150/200/300pcsx0.75mmx2m Optic Fiber Cable Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Meanwhile, please be reminded that due to lighting effects, monitor brightness, contrast settings etc, there could be some slight differences in the color of the pictures and the actual item.