Sturdy Hand Pump Features Hose Connectors For Vacuum And PressureThis solidly constructed air pump has an enameled steel barrel, plated steel valve hardware, and a wooden handle. The molded rubber piston has a triple O-ring seal, and both the inlet and exhaust ports are equipped with 9mm plain hose connectors. This allows the pump to be used with standard thick-wall tubing for vacuum experiments and also to generate overpressure. Dimensions: Length is 35cm, barrel diameter is 2.5cm, length of stroke is 19cm. Displacement is 66ml/stroke. Hose connectors are 9mm o.d., 22mm long.
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