For sell is an ALPA tilt/swing adapter 0° - 12°, 34 mm. This unit is the old model which supports a tilt of 0° - 12°,while the new one only 0° - 5°. It is no doubt that having 12° is more flexible. The adapter is about 95% new and rarely used. I think this model is highly sought after now.
Please note that this is a genuine Alpa equipment, not aftermarket copy cat. I bought it from official Alpa dealer.