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>convenient in construction and save much time and labor
1. G-----Pre-galvanized steel
2. H-----Hot Dip Galvanized
3. S4-----Stainless Steel SS304
4. S6-----Stainless Steel SS316
5. P-----Powder Coated
6. M------Mill/Plain Steel
7. A-----Aluminium
8. FRP--Fiberglass Reinforced Plastics/GRP