American Educational 7-421LG-A Borosilicate Glass Short Stemmed Funnel, 40mm Diameter (Box of 5) Short-stemmed funnel for adding liquids or fine-grained materials to flasks and other narrow-mouth containers Available in various diameters Short stem helps reduce clogging and enables a quick transfer of hot liquids to minimize recrystallization within the stem Made of borosilicate glass for durability and heat resistance Sold in a box of five