Bottle top dispenser for HF and other extremely aggressive liquids. With reagent recirculation system. Digital volume setting in various steps. Declaration of conformity acc. to DIN 12600. Piston; cylinder; valve seats and balls are made of highly pure ceramic (Al2O3). Valve springs are made of platinium/iridium. Autoclavable at 121°C. Complete with thread A 45mm; 3 thread adapters (A 32/ S 40 / A 38). 1 screw-coupled suction tube. 1 discharge tube unit complete. 1 spanner for valve with individual serial number and test certificate conformity certified.