a tube has a deflection section to allow it to align between two bores which are substantially coaxial . the tube has an inner wall , an outer wall , a first end and second end . the first end of the tube rigidly connects to the first member . the second end of the tube slidingly extends into the bore of the second member . the deflecting section has circumferential inner and outer grooves . these grooves extend in from the inner and outer walls of the tube . each of the grooves has an axial thickness that is much less than the distance between the grooves . the axial thickness is also less than the radial dimension between the base of each groove and the adjacent wall of the tube . this provides substantial rigidity to the deflecitng section , yet allows slight deflection .