... , high-intensitive, maintenance-free, pollution-free, environmentally-safe air-conditioner guardrail 1. assembly air-conditioner, easy to install; 2. stainless stell secure ... screw, anti-dismantle; 3. colorful air-conditioner guardrail, good decorative effect; 4. environmentally-friendly air-conditioner guardrail, non-pollution; 5. steel ...