Founded in 1976, Mechanical Research & Design Inc. is a manufacturer of a variety of engineering equipment and supplies. Located in Manitowoc, Wis., the firm offers its vast customer base an array of products that include pipe plugs, inflatable pipe plugs, specialty pipe plugs, reactor nozzle plugs and many more. The company provides sealing solutions in sizes from 1/2 to 144 with PSIG that ranges up to 5000 PSIG. Mechanical Research & Design Inc. also offers other products, such as specialty plugs, pipe joint testers, annular seals, inflatable seals, bulkheads, etc.