Material
ASTM-A653 CS Type B Galvanized Steel G-30 Coating LFQ Chemical Treatment

Ganges
4 – 9″ 30GA
10 – 14″ 28GA

Assembly
Assembled with C-115 2/16″ Zinc Coated Steel Rivets. Tabs are 3/4″ long to be used with metal. The collar is attached by using a colatch bead system.

Options
309SG: with Gasket
309SDG: with Damper & Gasket
309SDB: for Duct board