I have 25 units that were removed from working equipment and are very clean. The pumps were only used for a testing purpose, and no harsh chemical was ever used. I also have three phase D16b and D25b Leybold pumps if you are interested. The item "Leybold TRIVAC D16B Vacuum Pump Single Phase 110v" is in sale since Friday, October 5, 2018.This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Rotary Vane Pumps". The seller is "raiderqq" and is located in Los Angeles, California. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia.