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A high-density polyethylene aspirator pump that operates on water pressures above 11 psi (7584 N/m2). The integral check valve resists
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The self-contained Poly-Hand Pump works independently of air pressure, requires no adapters and delivers by positive pressure
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The SciencewareŽ Syphonette is made from polypropylene and polyethylene and is particularly well suited to withdrawing liquids
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