This Master Flow 10 in. x 4 in. x 6 in. End Register Box is ideal for when the opening in your floor is parallel to the floor joists and header and you need to create a right-angle， center-end transition between your system run and an air register. Connects to 6 in. flexible duct or round Pipe. Accepts a 10 in. x 4 in. grille.
Galvanized steel construction
Create a right-angle， center-end transition from the system run to an air register
Ideal for situations where the opening in the floor runs parallel to the floor joists and header
Installs with sheet-metal screws
Insulate ductwork for system efficiency and comfort
Seal seams with code-approved mastic， sealant or duct tape (not included)
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