Versatile, for use as a solvent recovery still for azeotropic separations of solvents, either heavier or lighter than water. As a solvent recovery unit, the lower 4mm PTFE double oblique stopcock permits total return to flask, total takeoff, and total storage in the 500mL graduated receiver. Bottom exit extends away from distilling flask for easier takeoff. The 2mm bore PTFE stopcock at top has tubing taht accepts a septum to permit use of a syringe for extracting small samples as needed while avoiding air contact. Joints are 24/40.,/p>