My daughters room has a large window that spans pretty much the entire length of the wall.  I needed a curtain rod that was small on the ends to fit the limited wall space I had on the ends of the window.  This rod did the trick!  It is not plastic, but rather a strong steel that is still lightweight.  Our window was 100" wide, and this rod was sturdy enough to hold the curtain without worry of collapse in the middle.  Highly recommend!