Vacuum Hose Adapter, Compatible Lubricants Acetone, Alcohol, Dish Detergents, Ethyl, Gasoline, Grease Lacquer Solvents, Oils, Sodium Hydroxide, End 1 Non-Threaded Diameter 2 in, End 2 Non-Threaded Diameter 2 1/2 in, End 2 Thread Size Not Applicable,...