We offer 4 brands and grades.
1)Class A (Brand: CRYSTAL): Double-sided gray board made of waste newspaper and corrugated paper, very good quality.
2)AA grade (brand: JADE): Full gray board, full waste newspaper, quality better than A grade.
3)Class B (Brand: STONE): A single-layer board made of waste newspaper and recycled paper, very good quality.
4)AAA grade, smooth surface (Brand: DIAMOND): Full gray board, smooth surface and best quality.
All above grades are suitable for arch files, boxes, hardcover books, puzzles, etc. You can select the grade as per your quality requirements. And our best sale is Grade A which has lower price but good quality.