Diffraction Grating sheet 1,000 lines/mm Linear 1 Foot x 6 Inches Wide

Was delivered rolled tightly and within a plastic sleeve. It was in perfect condition. Once unrolled, it’s the size I ordered and when using it to look at light, the diffraction spreads out on the sheet- not too far for our use though.

The media could not be loaded. The colors are nice. There are creases in it from top to bottom and will mess up your projects. Very small sheet for the price. The product photo makes it look like it’s on a roll and it is really just a small sheet. So disappointed, the search continues.

I don't know what the rest of the reviewers here need a full sheet of this grating for. Yes, it comes wrinkled, but there are plenty of regions (> 3 cm x 3 cm) that are smooth and usable. You don't need a full flat sheet of this stuff to make a spectrometer or demonstrate diffraction.It's also not a shipping issue; it is already wrinkled from the seller.

The review made me worry that it would be wrinkled up or folded. It arrived flat in a box well protected by a layer of protective sheeting. I am very pleased with this 6” X 12” sheet of diffraction grating.

The sheet had 8 or 9 dings in it.Pretty bummed.

The media could not be loaded. I am disappointed that this product has wrinkles. Can not use for intention.

I couldn’t even use it it had scratches and wrinkles. Waste of money I threw it in the trash I was so upset

Came in a fantastic packaging. It was straight and clean. It's so cool I want more. Also the size I got was not misleading for I wanted a small sample size. They have listed the price and sizing clearly.