Stamped Fittings is a yellow label union HVAC sheet metal product manufacturer, offering a complete line of round components. The EDGE high efficiency self-sealing gasketed system meets SMACNA Class 3 leakage. Our state-of-the-art manufacturing facility, specific to round duct, utilizes the latest automated technology resulting in quality, short lead times and a competitive price. We take pride in our customer service and offer the personal approach of a family business.