The Unico UPC-26TC-6 Sound Attenuator Tubing is a high-quality HVAC ducting tool designed by The Unico System. This 2" x 12' tubing is specifically designed to reduce noise levels in heating and cooling systems, making it ideal for ducting installation projects. With a rating of R3.3 and featuring TFS technology, this product offers superior sound attenuation capabilities. Perfect for professional HVAC technicians, this sound attenuator tubing is sold in boxes of 6.