This dispenser has an improved acid-resistant PFA piston coating to make bottletop dispensing safer than ever. Filling and discharge valves are user-serviceable. Unique quick-release connector allows fast, easy attachment to and removal of the dispenser from reagent bottles. Dispensette III is fully autoclavable for sterile applications. 0.5-10mL units are supplied with adapters for bottle thread sizes 24, 28, 33, and 38. 25-50mL units come with 28, 33 and 38 adapters and the 100mL unit is supplied with adapters for 33 and 38 thread sizes.