a coupling between a driving and a driven shaft includes a rigid tube to which are attached by bonding , in axially spaced apart relation at least two flexible annular elements of elastomeric material , the annular elements being of various shapes ; the outer periphery of each ring is bonded to an attachment ring which is attachable to a flange of a connecting hub with each hub mounted or connected to one the shafts ; in one form the tube is split axially and is adjustably attachable to the periphery of the rings .