This Rare Vtg PYREX Glass 6000mL Single Neck Round Bottom Boiling Flask is a high-quality piece of lab glassware made by Corning Pyrex in the United States. It is a round bottom flask with a volume of 6000mL, perfect for various laboratory disciplines such as physical, dental, medical, microbiological, and biological laboratories. Made of borosilicate glass, this flask is durable and suitable for boiling and mixing substances in a laboratory setting. With its vintage design and specific model, this flask is a valuable addition to any collection of lab glassware.