Description Professional for chemical laboratories, fine workmanship, making chemical experiments more perfect. Mostly used instruments used for analytical chemistry and other chemistry experiments. Environmentally friendly and durable, reusable, hand washable in warm water. Features - Color: Transparent. - Material: Glass. - Size: 13.00X7.50X1.00cm/5.11X2.95X0.39 inch. -5 Sizes: 30mm,40mm,50mm,60mm,75mm(diameter) - Constructed with a heavy uniform wall, and a strong, fire polished rim and stem to give a long service life - Funnel has a high resistance to chemical attack, and mechanical and thermal shocks - Great Visibility: It is clear so you can actually see the liquid go into the container you are filling - Be useful for transferring essences/extracts, for example Frankincense - Perfect for people who want to transfer small amounts of liquid into tiny bottles.