High quality: Made of high quality brass with screw threads, and soft rubber, with a rubber seal won't leak, which is extremely durable and corrosion resistant. Meet you different needs. Bike Valve Adapter Kit: The standard size adaptor fits most of bike pumps; Suitable for Dunlopventil (DV), Presta Ventil, Blitzventil (BV), Sclaverandventil (SV), Presta Ventil auf => Schrader/Autoventil (AV) Premium Presta to Schrader Adapter: All of these bicycle accessories are made of high quality pure copper with screw threads, and soft rubber, with a rubber seal won't leak, which is extremely durable and corrosion resistant. After a long time using,the color would not change. Easy to Install: Lightweight to carry, practical, convenient to install and easy to use, simply screw and inflate automotive pump, compressor. This will enable you to use a car foot pump or compressor to inflate your tyres and pumps. Popular to Use: The bicycle valve adapter kits fits for all common types of valves. Suitable for mountain bikes, road bikes, fixie bikes with presta valve tubes, also ideal for inflatable toys, air bed, gym ball, balloon, Yoga Ball and swim ring etc.