LEDwholesalers GYO2351 Aluminum 2-Ply Laminated Flexible Air Duct with Worm Drive Clamps, 6-1/2' Length x 6" Diameter
6" x 6-1/2 ft heavy duty 2-ply laminated aluminum flexible air duct, with two worm drive clamps.  Great for use in hydroponic ventilation systems.