... Thickness PP cover: 0.45mm,inner pocket: 0.15mm 2.letter size 3.12insert tabs,13 pocket 4.24pcs/ctn Type: Expanding file ;Material ... R&D, manufacture and selling of PP series office stationary. The product range includes, file folders, expanding files, clip files, ... document bags, document cases, clear books, card cases, pencil cases, pp tab dividers ...