With ceramic pistons. High precision bottle-top dispensers adjustable in fixed steps for the reproducible dispensing of liquids. Declaration of conformity acc. to DIN 12600. With patented high-purity alumino-ceramic pistons and highly polished DURAN® glass cylinders guaranteeing continual durability and precision. No surface abrasion. No sticking due to plastic swelling. No thermal expansion problems. Ratchet adjustment mechanism prevents accidental adjustment of the set volume. When not in use the pistons can be locked and the delivery tubes capped to prevent loss of reagent. The glass cylinders are encased in plastic for added safety and have a window for viewing the contents. Autoclavable up to max. 121°C/2 bar. Supplied with: complete with thread A 32 mm. 3 thread adapters (A 28, A 45, S 40). 1 screw-coupled suction tube. 1 discharge tube unit. 1 spanner for valve. With individual serial number and single calibration report.