prov:value
| - The pressure ring(s) 28 can also be composed of relatively resiliently deformable material, including, but not limited to, elastomeric materials, polymeric materials, polyurethane materials, latex materials, silicone materials or combinations thereof. [0043] An interior opening defined by the pressure ring(s) 28 can be in any suitable shape, including but not limited to, circular, square, triangul
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