Adapter is designed for use with flasks or reaction vessel lids that have a 10 or 20° angled side neck. Adapter has a lower inner joint and two top outer joints. Lower stopcock is either a 6mm or a 10mm PTFE stopcock with a 1/2” or 3/4” OD distillate takeoff for use with a compression fitting and TFE tubing. PLEASE NOTE: ADAPTER CAN BE USED WITH COMPOUND ANGLED SIDE NECKS. PLEASE NOTE: CG-1946-B and CG-1945-T REACTION VESSEL LIDS ARE DESIGNED FOR USE WITH THIS ADAPTER