Greyboard import inquiry Jordan

We are getting the grey board from many companies for 2-2.5 mm thickness at between 1000 and 1600 GSM.
We are interested to know about the quality that you can provide to us .. can you advise what thickness, widths and lengths are available at your company ?
We get normally at 889 mm width X 1000 , 1100 and 1200 mm length , 2.5 mm ( 1600 GSM) with one side black paper