Features: This duct increaser is engineered with a focus on maintaining smooth and efficient airflow. The transition between duct sizes is designed to minimize turbulence and resistance, which can lead to reduced noise levels and improved overall system efficiency. Constructed from robust galvanized steel, this adapter is built to handle the physical demands of various installation environments. Its rigid structure resists denting and deformation, ensuring the integrity of the connection is maintained even when subjected to accidental impact or pressure. Specifications: Material: main galvanized steel Color: main silver Size: approx. 6" to 7" Package includes: 1 x Duct Reducer Increaser Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays