Thick cardboard (white front, gray back) A4 25 sheets, 0.7mm thick This is thick cardboard with a white front and a gray back. It's thick and durable, so it can be used for backing boards, core materials, packaging, patterns, and crafts. Also suitable for shipping: packing/reinforcement/backing paper *Selling at a loss due to unwanted items, covering box and shipping costs. Limited stock remaining. Please order quickly.