12" x 12" Green Magnetic Field Viewing Film, Fun!

It's great, both delivery and quality.

Thanks

I like that it works for my purpose of collecting hidden magnets and for finding hidden microphones in clothing and furniture. Works great.

I was hoping this would work as well as I see in the pictures but it doesn't. I am using strong, medium sized neodymium magnets like those shown and have experimented with different lighting. The lighting makes a big difference but the effect is still not that impressive.

I had smaller sheets and wanted a bigger one because they are very cool. This big one works just as well.