Fittings are used in industrial automation to attach air tubing to pneumatic systems. For the first time, tubes as well as rigid pipes can be connected using this particular fitting. The corrosion-resistant polymer design is relevant for all industries and suitable for applications from medical technology to car body manufacture. The closed design is easy to clean and aimed at ease of operation: the tubing is inserted into the open fitting from the front and secured by pushing the blue sleeve with two fingers until it audibly engages.