Any PM on this flexible Alarm board?

[Nopyrite]

Hello, has anyone seen these. This item appears to be some type of flexible mylar with circuit paths on the back. I have access to more of these at $1 a piece. Any PM value? This is a great forum and I love to dig through all of the different posts. I do have one tiny complaint though. The search engine is hard to use with it "kicking out" the "common" words or maybe I do not know how to use it properly. Keep up the good work though.
Phil

 

[samuel-a]

probably some silver like the keyboards

 

[lazersteve]

The mylars contain silver traces.

Use Google to search the forum.

Steve