These PYREX® Claisen adapters have 19/22 Standard Taper outer joints at the upper end and on the parallel sidearm and an inner 19/22 Standard Taper joint at the lower end.
Product Family Description:
Cat. No. 9040-24 has outer standard taper joints at the upper end and on the parallel sidearm. With inner joint at the lower end. All joints on each tube are of the same size.
Cat. Nos. 9050-14 and 9050-19 have a three-way tube with two outer and one inner joint of the same size.