1, paper packing valve bag is made by Kraft paper and PP materials, 2, can add layer, 3, reused and environment protect 1, paper packing valve bag is made by Kraft paper and PP materials,2, can add layer,3, compression wear-resisting,4, environment protect.5, logo depend on your request. 6, beautiful and practical Materials7, delivery on time(15-20 work days after ensure the order)8, price have ...