18 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal

Add a 18 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.

• Nominal duct size: 18 in.
• Tabbed mounting edge
• Snap-together construction

Confirm opening size and the metal-to-duct connection method for your plenum or ductboard installation.

Sheet metal will come in 30 gauge or better. If you need a specific gauge, please call to place your order. Sheet metal is designed for rough in ductwork and is not made for applications where aesthetic standards are required. Inside may have duct sealant that is not applied by a machine and may look messy. The main function of the sealant is to seal air.
Special Shipping note: Ductwork takes up a lot of space and some of it doesn't stack easily so larger orders will be packed into several boxes.