The ROSTA double suspension units type AD-P/AD-C are used for suspending and supporting two mass shaker systems. The center point for frame fixation is in the middle of the double rocker arm. The AD-C model is designed to be frictionally engaged in the same way as the AS-C type. The housings and the inner square sections are made of welded steel. The inner square section of the AS-C type are made of aluminum profile. ROSTA Double Rocker Suspension Unit, Type AD-C, Specifications: 67 lb Load, 21 mm Amplitude, Welded Steel, Blue Painted, 2.36 in L x 2.91 in W x 11.21 in H