Selling Quality Hollow Iron Box
 Black hollow iron box is often called a pipe box where the inside is empty / hollow. In English it is called the Hollow Structural Section (HSS). Iron black hollow there are rectangular and rectangular for example hollow iron 40x40 and hollow iron 40x60
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The types of hollow used on the market:
1.Hollow Iron (Black)
2. Follow Galvanized
3. Follow Galvalum
4. Hollow Gypsum