The 93600 BULLET X Vacuum Pump is a 2 Stage Rotary Vane Oil-Sealed 7 CFM Pump that Pulls down to 25 microns or Better. Standard Features and Benefits Include a Wide Mouth Reservoir Port for Easier, Cleaner Filling, an Internal Intake Check Valve to Help Prevent Oil Backup into the System during a Power Failure, Heavy Duty Rotors and Bearings and a Large Brass Oil Drain for Easy Access to Fast Oil Changes