Master Flow 4 in. Dia. Starting Collar

Product Description

The Master Flow 4 in. Diameter Starting Collar is crimped for easy installation. This starting collar can be used to transition from a flat surface such as an unlined metal plenum to round metal pipe. Can also be attached to most unlined metal ductwork, such as rectangular duct. Constructed of galvanized steel, this starting collar is made for durability.|Made of galvanized steel|Fits most 4 in. metal pipe|Helps transition from unlined metal duct to round pipe|Seal seams with code-approved mastic, sealant or duct tape (sold separately)