RSK135-U is a very thin but optical clear removable polyester window film, which can be printed by lUV. 50 um (2 mils) optical polyester film coated with 20um (0.8mils) acrylic solvent removable optical clear adhesive. Not only make your graphic looks like printed on glass directly, but also removable in 3 to5 years indoor. 115 um matt anti-slid PET liner is stiff enough to feed film into printer smoothly. Special surface treatment ensures RSK135-U good scratch resistance. It is your best choice of window sign!