Product: Rubber-Cal "HVAC Insulated-Flex" Ducting Ventilation Duct Hose, 4-Inch by 25-Feet
Brand: Rubber-Cal
Color: 845605000000
Ideal for use for permanent and mobile air condition units
Compressible and easy to transport
Insulation maintains temperature of air inside Hose
Very cost effective insulated duct
Provides acoustical as well as thermal insulation

Search query: 4inch flexible duct for exhaust fan
Relevance: Exact