Bill, it's wood I'd say about 3/8" fiberglassed in the door. You should see the door is thicker in the middle, from above the window down near the bottom.
The rods are simple cafe' curtain rods. You can purchase them at WalMart. The package contains the rods, brackets and screws. The screws maybe longer than needed just go purchase some shorter ones at you local hardware store. Oh, and you can find them with nice caps on the end of the rods not just the simply flat end ones.
Here's some pictures:
[attachment=34590:
109_7859.JPG]
Top bracket is faced up and lower bracket is faced down. The length of the curtain holds the tension of the rods. My tie backs are fastened to the frame the window simply with a screw running through them and into the frame. Then the tie back ends snap together. It's a rubber frame on my window and I just used the shortest screw I could find. The tie backs have been there for 10 years. No problems.