Classification: FlaskModel Number: ReactorFlange OD: 150mmJoint: 24/40Material: Borosilicate GlassNecks: ThreeEAN: 6971311079532 24/40,150mm,Glass Reactor Lid,3-Necks,Use for Reaction Flask,Lab Glassware Central Joint is 24/40. Side Joints are all 24/40. ​Flange OD