Bartovation Diffraction Grating Sheet 500 Lines/mm [One 6" x 1ft Sheet]

Very thin and flexible, easy to cut into small squares. Wash your hands before and after handling so you don't leave any skin oil on the surface of the material.

The media could not be loaded.  These sheets last for a long time. I have made several silicone overlays for my designs and they work as well as people indicate on various YouTube videos.I've learned to do a test by sniffing off a corner and putting a little silicone on each side of the part snapped off so that I can tell which is actually the side that needs to be used.So far it's lasted through 6 silicone impressions and it's stood up to my uses.