Description Description Freudenberg Sealing Technologies (formerly Tobul) piston seals stay in shape even under the greatest loads. Piston seals have the job of reliably sealing the piston against the cylinder tube, while ensuring its efficient movement with minimal friction and without drift. Piston Seals are used in a wide variety of state-of-the-art sealing systems. They are specially adapted to their particular tasks and conditions of use with an impressive high level functionality. State-of-the-art hydraulic piston seals can be precisely adjusted to a particular application with the selection of suitable materials, such as Polyurethane and PTFE. In combination with the Freudenberg Sealing Technology geometries, which have been proven a million times over-they provide the optimal solution. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories