• 22 Gauge Galvanized Solid Body Construction (ASTM A653)
• 3/4” x 1/8” Polyethylene Double-face Gasket
• Manufactured to conform to SMACNA 2005 Duct Construction Standards
• Solid Body Reduces Leakage meeting SMACNA / ASHRAE Leakage Class 3
• Complete Seal Connection Standard
• Engineered to the Highest Standards test data available
• Testing Performed by Intertek-ETL-Semko
• Available with and without Volume Dampers
• Available with Insulation Standoffs and Insulation Extensions
• Patent # US D571,908 S
Super Heto with 2-inch Extension
Order as follows: A = Diameter