A restrictive fluid passageway is defined between an outer sleeve and a bracket to provide fluid communication between a working chamber and a compensation chamber or two compensation chambers. In one embodiment, two compensating chambers are arranged outside of the outer sleeve. In another embodiment, one compensation chamber is arranged within the outer sleeve, and the outer sleeve is constituted by axially separated three sections, i.e., first and second sleeve sections and a spacer section interposed between the first and second sleeve sections. A resilient deformable member and flexible wall member has a pair of axially spaced sealing lips projecting outward from an outer circumferential surface. The sealing lips are interposed between matched ends of the first and second sleeve sections and the spacer section and sealingly contact an inner circumferential surface of the bracket.