The Hydro Crunch 12 in. x 25 ft. black lightproof flexible aluminum duct is ideal for HVAC， bathroom， greenhouse， grow room， grow tent fan exhausting and other general purpose exhaust applications. 3 layers of ultra thick aluminum laminate are included in its composition. Temperature range from 0 to 140F High temperature resistant. Made from high quality aluminum， not only does the duct act as in intake and exhaust piping for active-cooled fixtures and reflectors， but also stores and dissipates heat at a steady rate， which reduces room temperature fluctuations. Benefits of air duct: helically shaped and internally crimped galvanized steel strip. Interlocking steel strips to form an air tight and leak proof system. Strong and flexible. Improves efficiency of the air flow. Dimension: 12 in. Dia x 25 ft. long. Includes free 12 in. duct clamps (set of 2).

Made from 3 ply ultra thick aluminum laminate for unparalleled durability

Wide variety of applications: HVAC， bathroom， greenhouse， grow room and tent

Fire-resistance coating， strong and flexible

Contains corrosion resistant wire helix

Includes free pair of 12 in. metal clamps (set of 2)

Operating temperature range of this product is 0 to 140F

Product should never be used for dryer venting applications