Please provide as much definition as possible.
A part number would be great but a good description will do.
For example include the Following in order for us to give you an accurate quote.
1) The material category for example might be Gravoply Ultra or Gravoply 2
2) The finish for example could be Matt or Satin or maybe Glossy or textured
3) The color if you wanted black with a white core you would say Black/White or black over white
4) The material thickness in mm or inches like 1.6 mm or 1/16"
5) The size of the sheet 1/4 sheet 12" X 24" or 1/2 sheet 24"X24" or a full sheet 24" X 48"
6) The quantity of sheets you need
7) Do you need adhesive on the back?
8) Do you need any special fabrication like holes drilled, the edges beveled, rounded corners etc.?
That information will really help in providing you a quick and accurate quote.
If you don't have much of these answers it would probably be better to call, we would be happy to go through it together with you to make sure you order the right product for your application.