Vessel only, enables cooling of reactant material during photolysis plus the added feature of a 2mm bore, 1:5 PTFE stopcock at bottom for draining contents of vessel. Made of borosilicate glass to accommodate the immersion well. With one 14/20 angled joint for sparger tube, one 24/40 vertical joint for condenser and one #7 Ace-Thred side arm for thermometer. Center joint is 60/40. Bottom is flat to allow use of stirrer magnet if desired. Volumes indicated are total volumes. Volume in reactive area of lamp is approx. 40-50% of total volume.