Heat Exchanger Products Corp. (HEPCO) is a Certified Woman Owned Small Business manufacturer of one of the most reliable condenser tube plugs on the market today. The expandable design allows you to install easily for a permanent seal or extract without damage to tube or tube sheet for temporary uses. Available in sizes 5/8”, 3/4”, 7/8”, 1”, 1 1/8”, 1 ¼” . In materials; Titanium, Brass, 316 Stainless Steel, and our Non-Metallic High Performance Polymer. Custom sizes and materials available upon request. Please visit the following website for a complete list of HEPCO products. http://www.heatexchangerproducts.com