Electroconductive polyamide with PTFE seal. Smooth-action dispensing stopcock with scaled lever to allow reproducible flow regulation, tapered, rotatable outlet spout to prevent dripping and allow use within narrow neck vessels (6mm minimum diameter) or tubing and R¾inch, inner threaded cap nut and inlet connection. Also suitable for use with solvents. Withstands pressures up to 2bar at 20°C ambient.