4 Inch Duct Hose made of heavy-duty aluminum foil laminated and PET for durability; 3-layer design with flame-retardant coating is resistant to corrosion and temperature variations
4" diameter air duct made of 3-layers ?aluminum foil + PET + aluminum foil?ensure working on -22 to 266? environment.
4 in Air duct hose use helically shaped and internally crimped galvanized steel strip designed, keep an air tight and leak proof, also steel Wire Helix to preserve the shape and provide additional strength and support to the body of the hose.
4 Inch Dryer Vent with adjustable length - This Ventilation Duct is 4 Inches in diameter and comes 16 Feet Long and 2 x hose clamps, which can be cut into as many pieces as you wish, just simply use a wire cutter and a paper knife
4 Inch Duct widely used in HVAC applications, bathroom venting, stove hood exhaust, dryer venting, kitchen cooking exhaust, grow room or greenhouse air circulation, etc