Feature The distant direct light back to the light refraction principle according to the Light, day or night reverse have good Optical effects of radiation, Itself has the color, and in the night under the condition of light scattering, in effect, reflecting the body color of light ,so that the vehicle can easily find existence of the rider, reflecting good warning action.Bright reflective series product, colorful light bicycle spokes.This product has 6 different colors ,the safety warning also show colorful cycling life, it is a very good decorative ornaments and night protective equipment. Specification 100% brand new and high quality.Color: red, blue, sliver, orange, yellow and greenInner dia. :1.8-2.5mm/0.087"-0.09"Outer dia. : 5mm/0.19"Length: 75mm/2.95" (inch) (approx)Material: Abs tube+ colorful reflective coating film Use To be used in the bicycle spokes, give a strong reflection under the light irradiation by the the electric torch or car at night. Play a security role.No batteries, can be used for a long time, sun and rain are available. Note This is reflective strips (not light bar, couldn't light itself), will be reflective in the light irradiation and give a security warning! Couldn't luminous if you ride in the dark without light! Package Included 12pcs reflective tube in a pack