The Synthware™ Photochemical Reaction Vessel with Internal Thread from Kemtech America Inc is made of borosilicate glass to accommodate immersion well. With #50 internal thread at top which accepts a RC50 bushing and Viton® O-ring, one 14/20 joint for sparger tube, one 24/40 vertical joint for condenser and one #7 internal thread side arm for thermometer. Supplied with quartz immersion well, caps and O-rings.