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