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

Ganges
5″ through 8″ – 30GA
12″ and up – 28GA

Assembly
Assembled with C-115 2/16″ Zinc coated Steel Rivets. Tabs are 3/4″ and the collar is attached with a colatch bead system.

Options
308SG: with gasket
308SDG: with gasket & damper
308SDB: for 1 1/2″ duct board
308SDDB: for 1 1/2″ duct board w/ damper
308SDB1: for 1″ duct board
308DDB1: for 1″ duct board w/ damper