... on given sample. You have variety of choices. Insulated Flexible DuctApplication: design for low, medium and high pressure ventilation and air conditioning ... material is aluminum, it is able to bear hot and fireproofing, can use for water heater, fanner, ventilator, center air-condition, ... : 30% deposit payment and 70% balance payment will pay only after shipment against copy of original B/L, if the ...