Invoil 702 Diffusion Pump Fluid is a general-purpose fluid designed for fast pumping of large volumes of gas. It is used to produce vacuums in the range of 10-5 to 10-7 torr. It is also used in vapor ejector pumps that attain vacuums of 10-4 to 10-5 torr. 1 Gallon Additional shipping charges may apply. Meinhard will contact you after your purchase is finalized.