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Straight connecting adapter used to connect two pieces of laboratory glassware with internal ground joints Two 14/20 standard outer joints; length: 70 mm Made of borosilicate glass, it exhibits excellent corrosion resistance and a low coefficient of thermal expansion; stable operating temperature: 450°C Inspect the product for cracks before use; instantaneous temperature changes must not exceed 140°C Warranty: 1-year limited manufacturer warranty for peace of mind