Magnetic stirrer, operated by water/air pressure PP-ABS construction. This unique stirrer is operated either by water pressure between 1kg/cm2 and 2.5kg/cm2 (15psi to 40psi) or by air pressure. No electrical supply is needed, thus eliminating heat, electric shock and explosion hazards. Corrosion-proof, all-plastic construction. Can be used on the bench or clamped to a stand with a 12mm (1/2inch) diameter rod using the integral bosshead.