Union Foam Board Premium Black 16 x20 x3/16" 10-Pack : Matte Finish High-Density Professional Use, Perfect for Presentations, Signboards, Arts and Crafts, Framing, Display (Black, 16 x 20 x 3/16")

I like the black core with black paper face to use with picture framing. These came packaged very nicely so they were flat and in perfect condition when they arrived. I cut my picture mats myself and managed a fair job. Advice: use a very sharp knife with a new blade to cut, otherwise the foam will tear and make a ragged edge. I did rip some surface paper with masking tape, which was disappointing. Just have to be more careful. Overall they worked well for the job and I would buy again.