Made of high quality, heavy duty Borosilicate glass 400mm condenser Integral inner tube with body, narrow jacket for efficient cooling Total length measures 23.25", body diameter measures 1.25" Perfect for any science or home laboratory 400mm Liebig condenser made of high quality, heavy duty borosilicate glass. Integral inner tube with body, narrow jacket for efficient cooling. Bottom side arm has an inner diameter of 4mm, and an outer diameter of 6mm. Top, curved side arm has an inner diameter of 5mm and an outer diameter of 7mm. Total length measures 23.25", and is 1.25" in diameter. Top of condenser has an inner diameter of 20mm, and an outer diameter of 28mm. Stem measures 3.75" long.