... , fumed silica bags Multiwall paper bags, kraft paper sacks, sewn bottom bags, PVSE bags, heat sealed bags, SOS bags, SOM bags ... food, rice, food addiitiveSize: length, 400-990mm; width, 280-600mm; bottom width, 45-52mmStructure: 1-6 layers--Straight tube; T-style ... with square bottom; M-style with gusset;--No sewing, no pullution, completely sealed ...