Check the listing for details. KONTES 55/50 Inner Ground Joint | Corning Lab Glassware Adapter. Condition: Used, Made in United States. Listed at 29.99 USD. Description:This KONTES 50/50 ground inner joint is a precision laboratory glassware component manufactured by Corning. It is designed to create secure, leak-resistant connections with standard 50/50 outer joints. Made from high-quality borosilicate glass, it provides excellent resistance to heat and chemical corrosion, making it suitable for demanding lab environments.Specifications:Brand: KONTESJoint Size: 50/50 Ground Joint – Inner MaleMaterial: Borosilicate GlassType: Inner Joint Adapter / ConnectorApplication: Distillation, vacuum systems, chemical handling, laboratory assembliesFeatures:Precision-ground 50/50 inner jointCompatible with standard 50/50 outer joint glasswareHeat- and chemical-resistant borosilicate glassSuitable for use in research, industrial, pharmaceutical, and educational laboratories.