Your welcome. The clamps would be for ductwork. Like a vent hose. It can also be called a hose clamp. But that is for smaller sizes mostly. For these it should be called a duct clamp.Here's one, and they are a good place to buy from. Quick shipping too.
Duct Clamp 6 [Duct Clamp 6] - $1.95 : neHydro.com, Hydroponics and Gardening Supplies