4 mil Clear Film is designed for all types of multi-layered imaging, signage and overlays. To ensure that your printer will recognize media presence, we interleave our film with white opaque paper. This allows you to “view as you print ” and avoid mistakes before completion. This interleaf can also reduce your chances of slippage and registration problems. This product is covered by U.S. Patent #5,532,064 and other patents pending. Compatible with HP DesignJets: 350C, 450C, 455CA, 488CA, 750C, 755CM, 750C Plus.