The HBM 6 Litre Manual Vacuum / Fluid Pump – Robust Version is a sturdier version of the standard HBM Manual Vacuum / Fluid Pump. It has a more solid construction, which is appreciated by mechanics who are often on the move. Thanks to the built-in screw cap where the hose is inserted, you are always assured of a proper seal to create the vacuum. This cap can also be removed when you want to pour out the container.