ITEM NAME:Mountain Biking Reflective Stick Bone Wheel Item U7D7 Mountain Biking Reflective Stick Bone Wheel Item U7D7 Material: ABS tube + colorful reflective coating film Inner slide: 1.8-2.5mm Outer slide: 5mm Length: 75 mm Color: yellow The distant direct light back to the refraction principle, after the light, day and night have reversed good optical effect of radiation, the color, and at night under the.Material: ABS tube + colorful reflective coating film. To be used in the bicycle spokes, give a strong reflection under the irradiation of light through the electric torch or by car at night. 12pcs reflective tube.