Aluminium Ducting 6 Inch 150mm 5M Meters Flexible Foil Ventilation Hydroponics

Aluminium ducting compliments a grow room with lots of room-internal ducting, this is due to the aluminiums reflective surface - meaning that no light is lost or absorbed by none-reflective ducting, helping to reflect all available light down onto your plants and keep the air moving around your grow room.

eBay