... protection of durable color, characters, logos and other panel contents without injury. 3. Small size, light weight, thin thickness, ... anti-oil, anti-corrosion and erosion of harmful gases proof, acid and alkali proof, quakeproof. 5. Low cost, high lifespan ... , In-house 100% functionally tested, components are guaranteed without any intermittent problem.7. Customized specification is available and keys ...