The Magura suspension fork pump.
For Magura Durin, Laurin and Menja suspension forks, and of course for all other suspension forks with Autoventi valves. Thanks to a special valve that allows the pump to be unscrewed without losing air, the air pressure can be adjusted with great precision.
Herstellerinformation: Magura, Stuttgarter Straße 48, 72574 Bad Urach, Germany, http://www.magura.com