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Available in various sizes, these borosilicate glass round bottom flasks have three necks - the center neck is vertical and the side necks are 180° apart and are inclined at an angle of 20° to the vertical. All necks have Standard Taper outer joints. Scientists rely on the expertise and artistic skills of Wilmad-LabGlass' engineers and glass specialists to manufacture NMR and EPR consumables and laboratory glassware of the highest quality. Used daily in academia, healthcare and chemical, petroleum and other industrial applications, Wilmad offers 7000+ items as part of their standard catalog as well as custom fabrication for individual glassware, glass repair services and OEM glass parts.