One piece flap monobloc design, without glue. Grooved Back, preformed accepting until 3 cm of back thickness. Size documents up to 24x32 cm. Glossy Card 5/10th: excellent rigidity for medium files. Glossy Card 7/10th: extra strong for heavy files, maximal protection. 4 colors by choice or assorted: blue, red, green, yellow. Cardboard folder