Robust two stroke piston pump for vacuum experiments, for final vacuum pressures down to 400 hPa. Air is pumped out on both the upward and the downward stroke of the piston. Includes carrying rod with handles and heavy base plus vacuum hose 5 mm diameter. Final pressure: 400 hPa Tubing nozzle: 5 mm dia. Dimensions: approx. 160x235x560 mm³ Weight: approx. 1.7 kg