Description:Fits most valves of road/mountain bicycles, motocycles and cars. Tire valve lights increase night-time and bad weather visibility for safety. Tire valve cap lights screw onto the valve stem of your car, bicycles or motorcycle in seconds. It will be flashing when you are driving at night, The light will be off when the vehicle stops and on when it runs. The dustproof tire caps are sealed completely, can prevent water, dustPROOF or sand coming into the tire, thus prolong the tire service life.Specifications:Material: plastic, metal.Size: 5.8*2.3cm.Color: show as pictures.Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package included:2 * Skull Shape Bike Valve Caps.