Manifold M40, hollow glass stopcocks, double

With 4mm double oblique, vacuum hollow glass stopcocks precision ground with corresponding numbers on barrel and plug. Lower vacuum chambers on stopcock are evacuated with a separate hole in the plug in order to hold the plug in the stopcock barrels. Beams are 22mm O.D. with front-right and rear-left hose connections with O.D. of 10mm. Distance between stopcocks is 75mm center to center. Important application notes: The vacuum pump must be connected to the rear tube. Before starting the application, the vacuum pump must first be switched on so that the stopcock plugs are pulled into the housing. Caution: stopcock plugs can fall out due to positive overpressure!