The OKI 45530703 is an additional 530-sheet paper tray for OKI Pro9000-series graphic arts printers such as the Pro9431. Adding a second tray increases input capacity so the printer can run longer jobs without stopping for paper, and it lets you keep two different stocks or sizes loaded at once, for example plain office paper in one tray and heavier card in the other. According to OKI's specifications the additional tray holds 530 sheets of 80 gsm paper and accepts media from 52 up to 320 gsm, matching the standard tray, so it copes with the thick stocks graphic arts work demands. The tray fits underneath the printer and is recognised once installed. Ideal for print rooms, studios and reprographics departments running a Pro9431. After comparing online prices, www.marvel.co.za should be the cheapest on this product.