Oxford 8 Ball Valve Caps BlackPrevent your tyre valve from accumulating dirt, dust and grime in style with Oxfords extensive range of novelty valve caps. Including the classic knurled and piston designs as well as the more unique skulls, dice and 8 balls, there's a perfect valve cap to complement your style. All Oxford valve caps provide a great seal that prevents dust, dirt, moisture and other grime from entering and also provides a last defence against problematic valve leaks.