Thanks for the input guys, sorry Jeff I didn't mean to mislead you, I am not exactly sure what they are made of and just assumed plastic because of the single plastic clip I do have which pins it to the heater box, but could very well be metal as I do not have an original and my pictures do not show a complete fastener only what you see in the pic I attached. the NPD ones could possibly be correct, but I would not know and is why I asked the question. The attached is the best picture I have of the attaching fastener. I have to assume they are metal now as it looks like that's what the majority is saying. Thanks all.