Jones Stephens’ 4” x 50’ Flexible Aluminum Foil Ducting is manufactured in aluminum. The duct is fire resistant and will not support combustion. The wire-reinforced, flexible laminated foil design is bendable to any configuration, making installation quick and easy. Made in the USA, the 4” x 50’ Flexible Aluminum Foil Ducting meets Jones Stephens’ highest quality standards and is the best choice for reliable function and excellent value.