[Sturdy] These pneumatic quick connectors are durable. The in-line air flow control valve can control the cylinder speed at low speed; the pneumatic connection will not drop under high pressure, and it is safe and reliable. Compressed pneumatic push-in fittings are equipped with a one-touch release button for quick and easy hose connection without special tools. [Easy to Use] The pneumatic quick-fit fitting is easy to install, easy to install pneumatically and easy to press under air pressure to connect the pipeline and ensure a firm connection without additional sealing. [Wide range of applications] Applicable hoses: polyurethane and nylon, liquid type: air only. Mainly used for quick connection of pneumatic circuits, pneumatic tools, pipe connection or separation without tools. High pressure resistance, can withstand strong pressure without tripping, so no need to release, can work for a long time. [Versatile combination plug] Pneumatic quick installation kit includes straight plug, plug angled, a Y-connector, a T-connector and an oval design for easy removal. Elliptical release rings on both ends facilitate pneumatic installation in tight spaces. [Package] Includes (3 pcs) 6mm straight pipe type manual override valves. The pipe can also be rotated 360 degrees when installing, which is simple and flexible. High precision threads ensure good sealing performance. High quality plastic, blue and black.