LSD A Pair of Night Safety Safe Cycling Mountain Bike Bicycle Turn Signal Handle Bar Handlebar End Plug LED Red Warning Indicator Light Lamp Flashlight Alloy 2 Modes Easy to install, direct bolt-on, shock resistant. Super bright and long lasting, low consumption. 270 degrees wide viewing angle, visible within 20 meters. Increase road safety and make your bicycle cool when driving at night. Apply to all bicycle, it is suitable for the tubes which diameter is between 16-23mm, external diameter is 25.2mm.