Feature●Length: 100 mm, 2 pieces●Material: copper+rubber●Mouth shape: built-in American valve core made of pure copper●Use: the bottom of the extender can be rotated freely, just unscrew the existing valve cap and screw this tyre valve extension●Use: This bicycle valve extension is suitable for all cars, trucks, motorcycles, RVs, trailers and motorhomes with standard tyre valvesDescription USAGE This bike valve extender is suitable for all cars, trucks, motorcycles, RVs, trailers and RVs with standard tire valves