121-6192, Festo, Festo QS Series Elbow Threaded Adaptor, R 1/4 Male to Push In 8 mm, Threaded-to-Tube Connection Style, 153049 Festo QS Series Elbow Threaded Adaptor, R 1/4 Male to Push In 8 mm, Threaded-to-Tube Connection Style, 153049