Due to the integrated structure of pneumatic air pressure cylinder, the installation precision and strength are relatively high. Buffer form for both ends of the rubber buffer, buffer adjustment is stable. Of course, the most important advantage of pneumatic air pressure cylinder is its free installation. It can be directly installed from any direction. In its side and the front also has the installation with the through-hole, therefore may install longitudinally and laterally. And free installation cylinder block and cylinder head integration, compact structure, square, greatly saves the installation space.