Pyrex® Liebig condenser with Top and Bottom Joints, Jacket L 300 mm, Joint: ST/NS 24/40, Corning (CAT#: STEM-L-1968-LKN) Pyrex® Liebig condenser with Top and Bottom Joints, Jacket L 200 mm, Joint: ST/NS 19/38, Corning (CAT#: STEM-L-1969-LKN) Pyrex® Liebig condenser with Bottom ST Joint, Jacket L 500 mm, Bottom Joint: ST/NS 24/40, Corning (CAT#: STEM-L-1971-LKN)