Connector...Use 8 mm diameter tubing.

Round Bottom Tube with Flare...Use 14 mm diameter tubing.

Bulb Centered in Tubing...The bulb should be 20-25 mm in diameter...made from 14 mm diameter tubing

End to End Seal with 2 Sizes of Tubing...Attach 6-8 mm diameter tubing to 14 mm diameter tubing.

T-Seal...Use 8 mm diameter tubing.

Small Flask...The bulb should be 20-25 mm in diameter... made from 14 mm diameter tubing.

Bubbler Tube...The outer tube should be 14 mm diameter tubing and the inner tube and the side arms should be 6 mm diameter tubing.

Condenser...The outer tube should be 14 mm diameter tubing and the inner tube and the side arms should be 6 mm diameter tubing.