... UNDER ISO 9001 As Shanghai Sangshan Machine Co., Ltd's Partners----shandong star steel sheet co,.ltdwe can offer PPGI ,PPGL AND GI ... , hot-dipped galvanized steel sheet, pre-painted alu-zinc steel sheet, alu-zinc steel sheet and aluminum sheet. Please do not hesitate ... from us, you will get more than products. Sangshan Machine Co., Ltd's Partner Can offer GI