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Two-Piece grease-free sublime with a flat bottom to enable heating on a hot plate stirrer. Condenser has a large top opening for use with dry ice/Acetone or liquid nitrogen. Connection between the flask and condenser is made with a flat O-Ring joint permitting parts to be gently separated for maximum product recovery. The capacity listed is that below the bottom of the cold finger. Vacuum control is provided by a 0-8mm grease-free chem-cap Valve. Complete apparatus consists of the condenser, flask, Viton O-Ring and horseshoe clamp.