121-6142, Festo, Festo QS Series Elbow Threaded Adaptor, R 1/8 Male to Push In 4 mm, Threaded-to-Tube Connection Style, 153076 Festo QS Series Elbow Threaded Adaptor, R 1/8 Male to Push In 4 mm, Threaded-to-Tube Connection Style, 153076