Multiple sizes and dimensions: the set includes a variety of fittings with different diameters and lengths, ensuring that they can be adapted to various pneumatic pipes and tools to meet diversified connection needs. High airtight design: Adopting advanced sealing technology to ensure that each coupling achieves excellent airtightness when connecting, effectively preventing gas leakage and enhancing system efficiency and safety. Quick connection and disconnection: the fittings are designed with a quick connection mechanism, which can be easily connected and disconnected without the use of tools, greatly saving time and labor costs. Durable materials: High-quality materials, such as stainless steel, brass or high-performance plastics, ensure that the couplings have good abrasion resistance, corrosion resistance and aging resistance to extend the service life. Multi-combination flexibility: Users can freely combine different specifications and sizes of fittings according to actual needs, and flexibly cope with a variety of complex connection scenarios.