Convection tube made of high quality, heavy duty, 3.3 borosilicate glass Useful for demonstrating the conventional movement of heated liquids Fitted with a filling funnel Apparatus measures 6" wide, 10" long (including filling funnel) and approximately 0.8" in diameter Great for classroom demonstrations Convection tube made of high quality, heavy duty, 3.3 borosilicate glass. Useful for demonstrating the conventional movement of heated liquids. Fitted with a filling funnel. Apparatus measures 6" wide, 10" long (including filling funnel) and approximately 0.8" in diameter. Required materials for experiment (not included): Item to hold tubing firmly upright (mounting with clips using rod and retort base will work), colored dye & Bunsen burner.