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3 Pieces stem clear scientific glass tube adapter with 3 pieces 14mm glass funnel for science and lab experiments Features: Suitable for: You can use the clear glass tube and clear glass funnel adapter for scientific experiments.They are easy to use and install. Applicable size: Three stem clear scientific glass tubes can be applied to a glass funnel with a bottom diameter of 0.56 inches. Specifications: Material: glass Size: as pictures shown Total quantity: 6 pieces Package: box Package includes: 3 x Glass tube 3 x Funnel adapter Warm notice: If you receive any damaged ones, please contact us to deal with them.