I got these to use in my Expedit but never managed to use them. They are in the original packaging so I am not going to unwrap one and assemble them. I did assemble one years ago and gave it to my friend who uses it. They are made in Italy and are light gray color. They are Kallax inserts and fit the 13 x 13" openings in Kallax and also the older Expedit. They are about 7-8" deep as I think I recall. If you have a different brand you want to use them in be sure that the opening is 13 x 13" and the shelf no more than 5/8" thick. These are very rare. From a smoke and pet free home. I do not accept returns unless I have misrepresented the item in the description. The photos are part of the description.

IKEA KALLAX Insert 203.460.72 RARE Made in Italy Plastic Divided Modular Display