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This gas inlet adapter has a 2 mm glass stopcock with a constant pressure retention device. The top arm is 9 mm O.D. medium wall tubing for use with septa or vacuum tubing. The overall height of the 14/20 and 24/40 versions are approximately 95 and 120 mm, respectively. Available in 14/20 or 24/40 with an inner or outer joint. SOLD INDIVIDUALLY.