Hydroponics Air Duct 1.This ducting is Double Thickness or With String. 2.Length: 20ft or 25ft. 3.Size: 4" 6" 8" 10" Hydroponics Duty Air Duct (With String)1.Aluminium flexible Air Ducting made of Aluminium foil+PET+helix steel wire.2.Apply for low /medium / high pressure, use for air ventilation in each environment .3.Round style, and easy to install oval or round connection .4.Fireproofing,at ...
