The Master Flow 10 in. x 4 in. x 8 in. universal register box is used to create a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grille. It is made of 30-Gauge， galvanized steel to provide strength and durability. This universal register box can be installed with sheet-metal screws.
Made of 30-Gauge， galvanized steel for strength and durability
Designed to create a straight (in-line) transition from 8 in. round pipe or insulated flexible duct to a 10 in. x 4 in. air register or grille
Use sheet-metal screws for an easy installation (screws not included)
Always seal seams with building code-approved sealant or duct tape (not included)
Always insulate ductwork for greater system efficiency and comfort (insulation not included)
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