Even more convenient: for sizes up to 24 x 32 cm. Can hold a stack of documents up to 13 cm. 3 entirely grooved flaps allow a perfect adaption to the document volume. Possible to write on the inside and the inside. Preprinted labels. Easier: closes by means of clip strap, fast and resistant. Strong cardboard, 5/10, flexible and strong. 5 available colors.