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

Ganges
4″ through 10″ – 30GA
12″ and up – 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 a 45Deg angle attached using a bead system.

Options
306DB: for 1 1/2″ Duct board
306DB1: for 1″ Duct board