This Oil has been replaced and no longer available. The new Oil is Agilent Varian GP General Purpose DS19 Oil See PN: P104289 on this website.Varian GP General Purpose Mechanical Pump Oil (sold here by the 1 liter bottles 9499390) is quality mechanical vacuum pump oil for the ultimate performance of your Varian Rotary Vane pumps. Varian GP Oil is specially prepared by Varian to meet the Rotary Vane exclusive specifications. We recommend that you change your vacuum pump oil at least every 3 months to prolong the life of your vacuum pump.