rustless, self-cleaning, high-intensitive, maintenance-free, pollution-free, environmentally-safe air ... environmentally-friendly air-conditioner guardrail, non-pollution; 5. steel pipe, good impact resistence; 6. electrostatic spraying surface, good self ... different areas; 9. from the pipe, mountings to coating, all are brand products, ensure our products' quality. galvanized air-condition guardrail