Festo QSL-B-1/2-10-10 , 130936, Push-In L Fitting with a 1/2 thread for size 10mm tube. Festo Pneumatic Fittings offer simple and reliable connection and release technology whatever the application. Festo's QSB range of fittings are available in a wide range of variants be it size or type of material used, each fitting comes with Festo's lip seal that ensures maximum freedom from leaks at the tubing/fitting connection. This system also offers the lowest actuating forces compared with other seal systems. Sold in Pack of 10.