Appliction of FFC cable Q: How does FFC flexible cable distinguish front and back?. Length:100mm 150mm 200mm 250mm 300mm. Product Type:Flexible Flat Cable/FFC. Widely used in a variety of printers print head and the connection between the motherboard, plotters, scanners, copiers, stereos, LCD appliances, fax machines, DVD players and other products, a variety of signal transmission and panel connected.