1. Premium quality Powder coated, pre-galvanized or hot dip galvanized steel or Aluminum. 2. Excellent finish. 3. Width 50mm to 1200mm, height 25mm to 100mm 4. Ladder type, perforated or covered duct options. 5. Stainless steel nuts & bolts. 6. Available with accessories like bends, Tees, Reducers, Supports etc. 7. Made in India.