Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: What material are the rod and the end finials made of--any plastic, or both metal? Thanks.
Document: The spring doesn't work, when you compress it from both ends, it just collapses to its smallest width. It's made form very thin metal. The ends are very small. the rod is only about 3/8&#34; diameter.
I was surprised by how thin the rod is, although if you read the description carefully, the data is all there. The rod itself is about 1/2 inch diameter and the end pieces are only 1-1/2 inches diameter. The rod is metal and very lightweight, make of rolled sheet metal with an open (not welded) seam. The first time I tried to get a lot of compression on it, I buckled the thin part of the rod.
Unfortunately it arrived bent in a box packaged with 2 pillows, not sure why it bent other than it is made of very flimsy metal and is easily bent. I love Levolor Kirsch products but this one needs to be redone.
No holes! I'm sick of putting holes in walls and these are the perfect solution. Although at the larger end of the width it begins to droop in the center, these are good for the shorter width windows or very light drapes.
It fit perfect where I needed it. It is hard to find tension rods only 2&#34;Got in perfect time.Thanks So Much
It is too small to be a shower rod as advertised. It is a tension rod and will not stay up with any wight on it. Other than that, it is pretty.
The rod looks distinctive even thought it was very inexpensive. Seems plenty sturdy for the curtain on the 36 wide window.
When purchasing a tension rod, make sure the weight of what you put on the rod is extremely light weight for this rod. It's decorative enough, but not functional.
Great little tension rod, hung one panel curtain on it. Looks nice in the living room, not at all like a shower curtain rod and goes with my other bronze window fixtures.
The rod can't hold too much weight before it collapses. If you can get a mounted rod, do so. If you are just putting sheer curtains in front of something, this should work for you but again, anything with a little weight to it will cause this thing to fall on the ground.
Answer: I can't remember as I bought them for my daughter's house.  They work great in two bedroom windows.  If the end pieces are metal, there is some sore of other material, probably a plastic or rubber that come in contact with the window opening.