Features:
3" (7.6cm) flexible duct tubing for venting and 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
Can be used in 4" Frame Walls
Dimensions: 3" (7.6cm) Inside Diameter & 10' (3m) in Length
Compatibility: Wall Duct Boxes - 4x4 & 4x8