Magnetic Roll Media for IColor 250 - Non Die Cut (4.75 in x 100 ft) (121mm x 30m) 1 pack. Magnetic Material is a smooth, bright white face sheet with a magnetic backing. This continuous stock material is used for digital die-cut magnets on the IColor 250. Note: The recommended starting knife pressure for the magnetic media is 22. This media is not meant to be cut all the way through because there is no liner. Instead, this knife pressure setting is meant to score the magnetic media so that it can be removed by hand after printing.