Mixed set contains: 25 each of the septa for 5 mm NMR tubes; 7 mm O.D. glass tubing; and 8 or 9 mm O.D. glass tubing 20 each of the septa for 9 or 10 mm O.D. glass tubing; and 10/30 joints and small test tubes 10 each of the septa for 14/20 joints; 19/22 joints; and 24/40 joints
