The housings of the element sizes DW-S 45 and 50 are made out of spheroidal cast iron, with inner square sections made out of aluminum. The inner square can be used for mounting plug-in lever arms on one or both sides. The element installation has to be effected by bolting the two support angles on customers machine parts. These elements have especially been constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint finished. ROSTA Rubber Suspension Unit, Type DW-A, Cast Iron, Blue Painted, 170 mm L x 170 mm W x 88 mm H