The ME 1 diaphragm pump offers a compact, high performance and easy-to-use solution that is perfect for a necessary vacuum source. The functional, space saving and innovative design with visible top mounted power switch ensures convenient and quick operation for day-to-day lab work. The PTFE diaphragm and valves are rugged and provide high chemical resistance Performance features Convenient, quick and simple to use due to the top mounted power switch Whisper quiet and very low vibration Requires minimal bench top space Maintenance-free drive system and proven long diaphragm life Ultimate vacuum (abs.) mbar/torr 100 / 75 Sized: 9 ¾" long x 4 ¾" wide x 5 ¾" high.