Ventilation ducts are made of galvanized steel and class with a double curved joints and cross bracing.
Ventilation ducts are made with galvanized iron, depending on the dimensions of 0.6,; 0.8 and 1mm.
For trunking dimensions beyond the page to 400mm price is 1.8 per kg.
For dimensions beyond the sides of 400mm to 600mm price is 1.7 per kg.
For wider dimensions pages larger than 600mm price is 1.6 per kg.
All fittings: elbows, branches, reducers, visits are made of galvanized sheet metal thickness of 0.8 mm.