... A123,SS400 4.Common pitch:30mm&40mm 5.Used in flooring,walkway A leading professional producer, ISO9001-2000 COMPANY , GRATING ... System in 2001. 60% of products is exported to the worldwide. There are many regular grating customers in USAOhio, Houston, ... . Such as steelmill black and hot dip Galvanizingand stainless grating flooring walkway, platform and steel structures, stair tread, well cover, ...