High quality materials: Our self-adhesive chain frame has a bright warning design, two-way elastic wear-resistant nano cloth, and consists of an active storage warning light module, a passive highlight warning module , and a complete passive chromatographic penetration warning module.Reflected light: Passive high-brightness warning module will be activated under strong light, and the reflective module will reflect the indicator light. After the passive module is activated, the light can be reflected at any angle.Easy to Activate: Active storage warning light modules have low requirements for activating light sources. Street lights, car lights, floor lights, architectural lights, etc. can be used as the activation of light sources.Noticeable effect: The full passive chromatogram penetration warning module, no matter what angle it is viewed under the light, the passive warning module will be presented in different colors at any angle, effectively penetrate the monochrome rain and fog to achieve the warning effect.Hook and Ring Design: The top and bottom unequal width hook and ring design can achieve a satisfactory and effective fastening effect. It is produced by a fully automatic mechanical positioning sewing machine to position independently the sewing position, which is firm and beautiful.Name: Luminous Protective Chain Stay StickerExpanded size: about 21 x 11cm / 8.27 x 4.33inColour: blackMaterial: stretch clothPackage Contents:1 * Bicycle Chain ProtectionOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.