Shenzhen Sihai Packaging Material Co., Ltd. is a manufacture of pp corrugated sheet ,pp plate sheet (also know as PP hollow sheet, pp corflute sheet ,pp coroplast sheet ,pp hollow board ) pp corrugated boxes ,pp partition ,pp layer pads ,pp corflute signs and the other pp plastic products for more than 6 years in Shenzhen China . We have specialized in the design, development, production and service of pp corrugated sheets, Polypropylene boxes, pp corrugated boxes, pp partition and pp corflute ...