... 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 ... reliable,In-house 100% functionally tested,components are guaranteed without any intermittent problem. 7.Customized specification is available and keys ...