When you are looking for Shaft Seal 001811A or 001811AS for your Sullair Air Compressors, you are on the right webpage. Both the two part numbers are the same shaft seal, the 001811A is a part number outdated while Sullair renewed the numbers to 001811AS. We can ship all our genuine parts to around the world from China. To learn more about us https://pdjdw.wpengine.com/about-us/