Various specifications: This bicycle pump nozzle set can meet all your needs - With various adapters, you can adapt unsuitable valves to air pumps or gas station compressors. Intended Use Auto-Compressor -Dunlopventil (DV), Presta valve, Detent valve (BV), Sclaverandventil (SV), Presta valve on => Schrader / car valve (AV). So you don't have to worry about improper pumps anymore. Sturdy and durable bicycle pump attachment: copper bicycle pump attachment - All of these bicycle accessories are made of extremely durable and corrosion-resistant copper. High quality workmanship will make this set a long companion. Easy to Carry: This compressor inflator mouthpiece set is small in size, only takes up little space. It's very convenient to take anywhere. Safe and easy: The package contains 12 pieces of inflation nozzle adapters, 3 modes allow you to make valves unsuitable for compressors, gas stations, bicycles or mini-pumps. The sturdy fit of the bicycle compressor valve adapters guarantees a tight seal and therefore no air can escape during pumping. Common use: the bicycle valve adapter kit is available for all types of common valves. Suitable for mountain bikes with circulation valves, road bikes, stationary bikes, etc.