Will these fit my valve stems?

Yes—these are designed for standard tire valve stems found on nearly all cars, trucks, and SUVs. They screw on hand-tight with no special tools or adapters needed.

Do I need to prep or paint these before installing?

No prep required. The black finish is ready to install as-is. If you want a different color down the road, they can be painted, but that's optional.

Are these a sealed cap or just for looks?

They're functional caps that seal your valve stems and happen to look good doing it. They'll keep dirt and moisture out of your tire valves during normal driving.