The HP CF306A is a genuine HP 512 MB DDR2 memory module in a 200-pin x64 DIMM format, used to upgrade the memory of compatible HP LaserJet business and enterprise printers. Adding memory helps a printer process large or complex jobs, such as long documents with heavy graphics, multiple fonts or high-resolution images, and can help keep print queues moving in busy workgroups. As a genuine HP part it is designed to match the printer's memory slot and firmware requirements, avoiding the compatibility problems that generic modules can cause. The module is organised as 512M x 64 and measures 67.8 x 31.1 x 3.8 mm. Confirm that your HP printer model accepts the CF306A before ordering, as HP printers use several different memory formats. After comparing online prices, www.marvel.co.za should be the cheapest on this product.