Add a cool, subtle glow to your wheels at night with these LED valve stem caps! You get 2 caps that emit a steady white light (non-flashing, so it's not distracting). They're from brand FF, part number 123, color white. They work on car, truck, SUV, motorcycle, or bicycle tires—basically any standard valve stem. The light activates automatically when the wheels spin, no batteries or wiring needed (they use motion/magnetic induction, I think!). It's a simple, fun way to customize your ride and increase visibility a bit. Brand new in original packaging. Easy to install: just screw off your old plastic caps and screw these on. They're not super bright, so they're more for style than illumination. Perfect for car meets, cyclists who want to be seen, or anyone who likes little automotive accessories. A cheap and easy mod that makes your vehicle stand out a little in the dark. Just make sure they're tight so they don't get lost!