A roller assembly is provided. The roller assembly comprises a groove that the
includes two opposing surfaces. The roller assembly comprises either frictional
surfaces positioned along the groove, or O-ring(s) coupled to the groove. The frictional
surfaces may be a plurality of holes at spaced intervals along the opposing surfaces
of the groove, a plurality of holes, each hole sized so as to extend into the two
opposing surfaces, at spaced intervals along the opposing surfaces of the groove,
or may be a bead-blasted surface or a knurled surface positioned along the opposing
surfaces of the groove.
