Galvanized steel adapters for ventilation boxes. Available in all diameters and for the following ventilation units models: 7/7, 9/9, 10/10, 12/12, 15/15, 18/18, 20/20, 9/4, 10/5, 12/6, 15/7, 18/9, 20/10 and 22/11.
Available in stainless steel upon request.
