G.A.S Black Combi DuctingG.A.S Black Combi Ducting is a durable, reliable option for growers looking for affordable ventilation in their grow space.Purposely designed in black, the ducting’s double-layered construction prevents light leakage. Black Combi Ducting has an aluminium inner layer which add stability and durability. Its flexible plastic outer layer greatly increases its resistance to tearing and preventing light leaks.Why buy?Dual layered construction – aluminium sheath with polyester outer layerGreater resistance to tearing than standard aluminium ductingReduced noise levels compared with single layered ductingPrevents light leaksTop Tip: A great option for growers looking for quality ducting on a budget