18" X 18" X 18" Duct Board Triangle used as a Tee Wyes (Make your own Duct Hole Size)
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18" Duct Board Triangle used as a Tee Wyes Make your own Duct Hole Size
TRIANGLE TEE WYE CAN ONLY HANDLE UP TO A 16" DUCT BOARD START COLLAR. Made from Fiberglass Duct Board material
Use only duct board start collars with Duct Board Triangles to attach the ductwork.