Register Boxes create a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grill. Available in an assortment of configurations. This particular item transitions from 12 in. X 4 in. register to a 6 in. pipe or flexible duct.
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- Always seal seams with building code approved sealant or duct tape
- Install with sheet metal screws
- Always insulate ductwork for greater system efficiency and comfort

















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