Check the listing for details. OmniVac 5 Dental Lab Vacuum Adapter. Condition: For parts or not working. Listed at 49.99 USD. I am helping a friend clear out a closed dental office. I do not know anything about dental equipment. I plugged it in and turned it on it appears that it was functioning properly. But I am listing it as is because I do not know how to operate it to make sure it is doing what it is supposed too.