PP Woven Bag, Valve Bag, FIBC manufacturer / supplier in China, offering Custom 25kg 50kg Paper Kraft Sack Valve Cement Paper Bag, Factory Direct Sale Customized Dimension BOPP Laminated Craft Woven Bag Plastic Polyethylene Bag with Valve Port, Lime Mortar Black Carbon Sack with Valve Port Recylable Material Plastic Polyethylene Bag and so on.