Speedi-Products EX-SVH 04 4-Inch Diameter by 20-Feet Length Standard Vinyl Hose Speedi-Exhaust Products are made in the USA Flexible Vinyl Duct can be used for bathroom fan exhaust or fresh air intakes. Do not use for Dryer Venting Seal joints with approved duct mastic sealants and tapes Consult your local building codes for approved installation practices