MTN8406 Features: -High Performance 3.0 single stage deep vacuum pump.-Internal check valve to prevent escape of liquid oil.-Gas ballast prevents oil contamination with dual ports for R-12 and 134A.-Ultimate vacuum of 75 microns.-High volume cooling fan provides cool air to motor and pump 3.0 single stage deep vacuum pump with internal check valve to stop oil blowout. Thermally protected motor with On/Off rocker switch..-3.0 Single Stage Deep Vacuum Pump. Warranty: -New out of box defects "30d warranty"/ otherwise repair only.