Edwards Ultragrade 20 Oil is suitable for all Edwards EH Booster Vacuum Pumps. They are also compatible with Busch Panda/Puma, Busch R5 >100m^3/hr, Rietschle R Series Boosters, Pfeiffer Okta Line & Leybold RUVAC series & Kinney KMBD Booster Vacuum Pumps.