Dundas Jafine Metal Worm Gear Clamp, 4″ for Metal Flex & Vinyl Ducting

Dundas Jafine MC4ZW Ducting Worm Gear Clamp.

Use with 4″ Semi-Rigid or Rigid Aluminum ducts & Vinyl Ducting.
These clamps are made of heavy duty galvanized steel and are ideal for fastening ducts to aluminum pipes or elbows.