Schlenk Flask, 2-Neck w/ Glass Stopcock or Airfree® Valve

These 2-neck, round-bottom Schlenk flasks have two identically-sized standard-taper outer joints. Choose from a 2 mm glass stopcock with constant pressure retention device or a 04 mm PTFE Airfree® valve with integral bore and serrated hose nipple on the sidearm.