Inland 19 ULTRA Semi-Synthetic Vacuum Pump Oil Disclaimer: Spigots/Faucets are only compatible with 5 Gallon Jugs and must be purchased separately Inland ULTRA products are semi-synthetic hydrocarbon fluids designed to endure thermal and chemical stresses much better than standard vacuum pump fluids. The ultra-refined process eliminates nitrogen, sulfur, oxygen, and aromatic hydrocarbons, leaving a clear base stock virtually free of impurities. The additive package will not volatize | Inland Vacuum Inland 19 ULTRA Semi-Synthetic Vacuum Pump Oil