... ppgi,gi printed steel 4-Four subsidiary firm Building material/PPGIWe are Shandong Longfa Group, We have four ... Shandong Longfa Steel Plate Co., Ltd, Shandong Jialong New Material Co., Ltd. Shandong Longfa Steel Structure Co., Ltd, ... regular product are showed as followings.1. base material: GI or ALZINC steel coil2.thickness:0.17- ... special order can be negotiated.loraytel:18206569768building material