Bicycle Reflector Reflector Backhawk Mounted Seatpost Rear High Brightness Warning

• AS, BS, JIS, CPSC certification.Material: High quality ABS+PMMA.Size: length 55mm x height 40mm.Installation diameter: 22.2mm • Package contents: Rear reflector (red) x1 • Light source: external light.Activity rules: Front reflector: up and down rotation • How to use: When the reflector receives strong light from an outside light source at night, it emits a bright color to tell you to slow down and drive more slowly. • 2 years quality guarantee.Please check the size carefully before purchasing to avoid any inconvenience.