Thermoflo Lay Flat Ducting Sizes Available; 4", 6", 8", 10" & 12" 

ThermoFlo LayFlat Duct Sleeve is Made from a fire retardant black polyethylene plastic, oversized to fit easily onto connectors and fans. This very economical choice for temporary air diffusion is convenient and quick to install Available by the foot, and marked approximately every foot for easy installation / instructions included. Made in North America with strict quality controls