About Seller: EST Group is a company that focuses on the design, production, and promotion of advanced products and maintenance services for shell and tube heat exchangers, condensers, coolers, and chillers. Our flagship product, the pop-a-plug tube plugging system, is widely recognized as the top technology in the industry for sealing leaking and deteriorated heat exchanger tubes. Additionally, EST Group develops and manufactures pressure testing and isolation plugs that streamline and accelerate the process of pressure testing and/or isolating piping, tubing, valves, pressure vessels, and various specialized applications.