This unique stirrer is operated either by water pressure between 1 and 2.5 Kg/ cm2 (15 to 40 psi) or by air pressure. No electric supply is needed thus eliminating heat, shock and explosion hazard. Corrosion proof allplastic construction. Can be used on the bench or clamped to a stand with 12 mm (1/2”) diameter (our part. 267). Supplied complete of tubes.