Features:
3" (7.6cm) flexible insulated duct tubing intended for use in conjunction with Wall Duct Boxes - the 4x8 and 4x4 boxes that are for use with the
HiFlo and HiFlo Lite Fan Units
Will connect to exhaust end of rough-in box and carry the heated air inside the walls or ceiling to vent to another area in the home.
UL listed to meet most code requirments
Can be used in 4" frame walls
For Use with the HiFlo and HiFlo Lite Wall Duct Boxes
Dimensions: 3" (7.6cm) Inside Diameter & 25' (7.6m) in Length
Compatibility: Wall Duct Boxes - 4x4 & 4x8