PROflex is a flexible duct connector designed to isolate equipment noise and vibration from the ductwork, consisting of a fabric secured to sheet metal on both sides. Typically, the connector is ...

UL 181B-FX may be used only on Class 1 Flex duct. In construction, these tapes must be foil, film or cloth with a minimum width of 1.88 inches; the primary function is to seam, seal and join HVAC ...