NKK Protective Polyurethane Splash-Proof SmartDisplay Overlays are 0.3mm thick sheets of non-yellowing, 90% transmissive polyurethane with a water-resistant, 10mm wide perimeter of adhesive. The overlays are designed to provide increased protection to a SmartDisplay or any product requiring additional protection. When removed or replaced, the adhesive does not leave a residue. NKK Splash-Proof SmartDisplay Overlays are available in four standard sizes with two individual overlays per package.