The liquid convection apparatus is made from Borosilicate Glass and is bent into a rectangle with a filling funnel. To show the convection of heat in a liquid, simply fill it with a colored liquid and place a heat source at one of the bottom corners. Glass tube is 20 mm outer diameter bent into rectangle approximately 200 x 150 mm. Comes in a custom package to ensure product arrives and can be stored safely. Required but not included are a support stand, clamp, heat source and colored liquid.