AIR DUCTING SIZE: 4 inches (102mm diameter) x 16 feet (5m extented length), Steel wire space (20mm) PVC VENT HOSE:Black PVC Film,Lightproof and Waterproof,And Also Reducing Noise from Fans and Carbon Filter Systems.Compared to Traditional Aluminum Foil Hoses, PVC Dryer Vent Hose Are Stronger, Less Prone to Tearing and Have a Long Service Life. EASY TO USE: YIJU Aluminum Ducting Can Be Easily Cut By Wire Cutter and Paper Knife(Caution, Risk Of Scratching Hand). The package include 2pcs 4inches stainless steel Hose Clamps to fix it well. This Ducting Suitable for Kitchens,Bathroom,Grow Tent,Green Houses and Air Conditioner Etc. FLEXIBLE AIR DUCT: This vent duct can be bent at well. We Specialize in Flexible Hose for Heating, Cooling, and Venting in Outside Air to Maintain High Quality Air Control.Whether You Want to Cool a Car, House, or Industrial Sized Building. the dryer vent almost can meet all installation requirements. VENTILATION DUCT WIDELY USED IN:Ducts Are Conduits or Passages Used in Heating, Ventilation, and Air Conditioning (HVAC) to Deliver and Remove Air.Works With Fans and Carbon Filter, It Also Can Be As Ac Exhaust Hose and Dryer Vent Hose., Weight: 1.73944724718 pounds, Manufacturer: Yiju