Pyrex 65/40 Ground Joint Socket Only | Corning Lab Glassware USADescription: Pyrex 65 40 ground joint socket, manufactured by Corning in the United States. This joint is commonly used in laboratory setups for securely connecting compatible glassware components. Ideal for research, education, or industrial lab use. Specifications: Brand: Pyrex Corning MPN: 65 40 Joint Type: Ground Glass Socket (female) Joint Size: 65 40 Material: Borosilicate Glass Features: Pyrex lab quality borosilicate glass Female (socket)