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Suitable for sealing and connecting laboratory glassware, and can be used for assembling lab setups, closing containers, and temporary sample storage Features a 24/40 standard ground joint for connection with compatible glassware, allowing convenient installation and removal Made of borosilicate glass with thermal stability and chemical resistance for a variety of laboratory operations The stopper body features a hollow structure that helps reduce overall weight while providing a practical solution for sealing laboratory glassware Check the ground joint size and the specifications of the compatible glassware before use to ensure proper fit