The black CCS pad is charcoal black foam, shown from both sides in the picture: the dimpled face of one pad and the hook-and-loop back of another. In the 5.5in range it comes after green polishing and finishing and before blue final finishing.
Black is the finishing pad. Lake Country says its foam is firm enough to be pressed a little harder on the last pass, when buffer swirls are taken out, that it has no cut, and that it lays down thin, even coats of wax, sealant and glaze.
The pad is 5.5in across and 1.25in thick (140mm x 32mm), for rotary and dual action polishers. CCS stands for collapsed cell structure: the dimples on the face are pockets of closed foam cells that do not soak up polish, so more of it stays on the working surface. Lake Country lists slower polish absorption, better control, less pad skipping and less heat.
More in Finishing Foam Pads and from Lake Country.