Pesp 2pcs Auto Wheel Tire Light LED Lamp Wheel Valve Cap Light for Car Bike Bicycle Motorcycle (Blue) Accessory Type Gadgets & Auto Parts Dimensions (cm) 3.5 x 1.6 x 1.6 If you want to add that personal touch to your Car, Bike - lighting is one of the best ways When it is dark and your wheels start to move, they automatically light up creating a solid disk of light that appears to hover above your wheels Fits most valves of road/ mountain bicycles, motorcycles and cars