The NP4DLM BreakFree® Cordless Vacuum Pump features a high-performance lithium battery capable of up to one hour of continuous running time. At a scant 15.4 pounds, the unit is exceedingly efficient and, for technicians, easy to carry and store. The NP4DLM's dual-stage operation provides high vacuum down to 15 microns. A check valve prevents backflow. Other highlights include an isolation valve as well as a lifting hook and gas ballast for better moisture handling. Its inlet port fits flares of ¼-, 3/8-, and ½-inch.