... ) Gaskets, O-rings, seals can be made from solid or hollow rubber extrusion profi Character:1) Gaskets, O-rings, seals can be ... made from solid or hollow rubber extrusion profiles2) No tooling required for standard ID / OD O ... be made in virtually any diameter4) Hollow cross section O-rings requires less closure force5) Hollow O-rings, gaskets, seals can be ...