This set uses the first white lighted wheel introduced in the world. This top of the line 76mm diameter X 24mm width lighted wheel set replaces 76x24mm luggage wheels only. All parts you need to replace your wheels on luggage, including ome Travelpro. Not all luggages accept this size wheels. Please make sure to check your wheel size before ordering. Wheels are top quality lighted (light up) wheels designed to carry heavy loads if necessary and light up brightly even at slow speeds. Wheels come with ABEC3 or better bearings already installed. Set includes 2 wheels including bearings, 4 special spacers, 2 axles (34mm long), and 2 Allen wrenches. So let your luggage be visible day or night for safe traveling. Used extensively by flight attendants. Power is generated through a patented micro-generator and by the movement of the wheels, therefore no batteries are required. There are 4 lights in each wheel which provide a bright white light. To check wheel set with no lights search for B00P4J5MLO, for all red lights B00CXWMDSK, for all blue lights B00CXWRKO2, and for mix lights B00CXWI3OS. Please measure your existing wheel diameter and axle length before ordering.