The ROSTA double suspension units type AD-PV/AD-C are used for suspending and supporting two-mass shaker systems. The centre point, for frame fixation, is in the middle of the double rocker arm.
The AD-PV suspension units are mounted by means of fixing flanges.

The housings and the inner square sections are made of welded steel. The core of the AD-PV type is equipped with fixing plates constructed analogously to the AU type.