Our curtain rod made of high-quality metal, this heavy duty curtain rod has an outer rod diameter of 1 inch and an inner rod diameter of 7/8 inch, a thickness of 0.5 mm, can hold up to 25 pounds and support heavy curtains or valances without bending or sagging. Perfect for heavy light-blocking curtains or layered drapes. Special inner coating ensures smooth, quiet curtain movement, no dragging or scratching—fits for all kinds of curtains,such as grommet, ring, back tab, rod pocket, and top tab curtains