Non-Insulated Aluminium Ducting 4″ X 6M – 3 Ply Hydroponic Ventilation Ducting
This aluminium ducting has a four inch diameter and is sold in six meter lengths. It has a max temperature rating of 200 Celsius and has three layers for extra strength.
Hint: If you’re running one fan in a small tent you can just cut the roll in half – saves you buying two 🙂