Working on a pneumatic (air-powered) system? This SL8-01 6-piece set is a handy bunch of fittings for controlling your air flow. Each piece is a combination fitting: it has an 8mm push-to-connect port on one side—you just push your 8mm OD (outer diameter) plastic or nylon air tubing straight in, and it locks in place for a secure, leak-resistant connection. No tools needed! On the other side, it has a 1/8-inch male NPT thread that you can screw into your air manifold, tool, or another fitting. But here's the key feature: each one has an integrated speed control valve (a little knob you can turn). This lets you manually adjust and fine-tune the airflow speed going through that line. It's super useful for controlling the actuation speed of pneumatic cylinders, air motors, or other tools where you don't want full blast all the time. Having a 6-pack means you can set up multiple lines in your workshop, on a project, or for hobby applications like model making or automation. They're essential accessories for anyone tinkering with air compressors, pneumatic tools, or DIY air systems. Make your setup more professional and controllable with these handy valves.