Hand Air Pump, 1 Each

The United Scientific® Hand Air Pump is a manual piston pump for classroom vacuum and pressure experiments. It has a painted steel barrel, steel valve assembly and wooden handle, and both ports carry hose connectors so one pump can create a vacuum of 20"Hg or generate pressure. The pump measures 14 in long with a 1 in barrel. Physics teachers use it with bell jars, vacuum plates and gas-law demonstrations.