1. Sliding column structure, good sealing and sensitive response;2. The three-position pneumatic valve has three intermediate functions to choose from;3. The double-head two-position air control has a memory function;4. The inner hole is processed with special technology, which has low friction resistance, low starting air pressure and long service life;5. No need for lubrication;6. The valve group can be integrated with the base to save installation space;Category: Air Control Valve, Brand: Airtac, Series: 5A