... by rain.Good load-carrying ability and anti-impact resistance , the test show no crack happened after 1 kg ... specificationsPerformanceStandard CriteriaStandards of Feiyu ProductsHorizontal Anti-breaking Force ≥3000N/M ≥4900N/MVertical Anti-breaking Force≥200N/M≥320N/MBounce ... , acid and alkali resistance, low noise, thermal insulation, anti wind and earthquake, environmental, light and easy to install ...