Two piece seal set for sealing dual action (OMK-MR) and single action (OMK-E) pistons, consisting of a profile ring with an ISC O-ring as the buffer element, example applications: manipulators, HGV loading cranes, hydraulic control equipment, presses, pressure; machinery, injection moulding equipment and agricultural machinery, standard cylinders. Application parameters: pressure: 40 MPa; Temperature : -30/-10 to 100/200C (depending on the material) speed: 5 m/s.