Neptune Paper Company Over the years, we have been able to associate ourselves with the finest and most reliable papermakers to cater to the unique needs of every customer. We provide kraft paper to manufacturers of corrugated boxes, paper tubes, core pipes, paper bags, fiber drums, and more. We are trusted suppliers of kraft paper and one can count on us to source the right product ranging from 40 gsm to 700 gsm & 12bf to 45bf at the most competitive prices.