2Pcs Glass Pipe 10 Inch 5mm Glass Tube

Glass Pipe 10 Inch (±) 5mm Open Double Mouthed Glass Tube. (±) 5mm borosilicate glass pipe fits in all rubber stoppers & attached to (±) 4.8 mm plastic or rubber tubing. Pack of 2 Pcs.

This tubing fits very tightly in #3 and smaller stoppers. Use Vaseline or cooking oil to help insert the tubing into the stopper, holding the tubing with a cloth to protect your hand if it breaks.

You can easily make a bend in a 5mm glass tube by heating the tube in a candle or alcohol burner flame until the glass softens. Then carefully bend the tube to the desired shape and hold it in that position for a few seconds until the glass hardens again. Be sure to heat the glass tube over a section about 1-1/2′ long to avoid crimping the tube when you bend it.