Don't have the info on the stuffing, but some insight on replacement. Once you get the stuffing find a piece of PVC or conduit the same size as the shaft. Then cut you pieces to fit the shaft. The cuts need to be on a bias and the joints need to be staggered, say 12 o'clock, 4 o'clock and 8 o'clock. Make sure you have removed all of the old stuffing. and cleaned it out. A couple of angled metal picks work well. when reinserting the new stuffing have a 1/4 dowel with a larger wooden handle attached to it so you can easily work the stuffing in and even tap a bit with a hammer. Seating the first one in tightly is necessary so once seated screwing on the nut and tightening a bit will help. Do this same process for all three. Once complete install nut and do not over tighten. Run for a while and check the drip while in motion. You want about one drip every 20 seconds. Have a laser thermometer. Check you water temperature that the boat is running in and then the nut temperature There should be no more than a 20 degree difference between the two, 10 degrees is normal, with the nut being warmer than the water. Final adjustment can take a period of time over several hours of use. When tightening go very slow. Only about 1/8 of a turn at a time.