PP desktop file stand tray holder 1.Got ISO9001 Certification 2.size:A4 and FC 3.volume:3 column 4.color,black blue,red,pin PP desktop file stand tray holder1.Got ISO9001 Certification 2.size:A4 and FC3.volume:3 column4.color,black blue4.OEM orders are welcome. PP desktop file stand tray holder