The ThermoFlo™ 1000S Series black core flexible air ducting is designed for low to moderate operating pressures, offering a cost-effective solution for applications where UL approval isn't required. Manufactured with 2-ply aluminum casing and a unique black core, its metal helix structure ensures the duct retains its shape, effortlessly fitting onto connectors and fans, allowing for a swift and convenient installation process that aids in cost reduction.