Specifications: Viscosity(25C)mm2/s :165 ~ 185 Diopter 25C:1.5765 ~ 1.5785 Specific Gravity :1.090 ~ 1.100 Flash Point C:Min. 210 Condensation Point C:-14 ~ 18 Minimal Vacuum Level , Pa: Max. 6.65 X 10-8 Saturated vapor pressure, Pa:Max. 6.65 X 10-9. 274# Vacuum Diffusion Pump Silicone OilDC-704,HIVAC F-4 is available in 200 kg Iron Drum, 25/50kg plastic Drums.