Half Ton High Purity USA ISO BUTANE 99.5% Guaranteed 6" 2 torr Ambient Environmental Temp AELM6 2 torr Ambient Environmental Temp 10–30°C Heat up time 7 minutes Inlet Connection NW50 Discharge Connection NW25 Silicone Oil Capacity Approximately 30 ml Cool Down Time 20 minutes Pump Dimensions The pumps have the unique ability to deliver excellent ultimate vacuum in both high vacuum and high throughput modes with or without gas ballast It’ll arrive in a DOT refillable LP tank 8% Methane <1 ppm Ethane <1ppm N Butane <2000 ppm Propane <250ppm Isopentane <2 ppm Water <3 ppm CO+CO2 <5ppm Oxygen <5 ppm Nitrogen <10 ppm Sulfur Non Detected