{"product_id":"assorted-pyrex-and-kontes-single-neck-round-bottom-flask-500-ml-14-20-stj","title":"Assorted Pyrex and Kontes Single Neck Round Bottom Flask 500 ml 14\/20 STJ Lot of 2 Flasks","description":"\u003cp\u003eThis lot features two high-quality 500 mL Round Bottom Flasks with 14\/20 Standard Taper Joints (STJ). These flasks are essential for organic synthesis, distillation, and refluxing, especially when working with smaller \"microscale\" or \"short-path\" glassware setups. The Pyrex (Corning) 4321A-500 is a laboratory staple known for its ruggedness. \u003cspan class=\"citation-101\"\u003eThe 4321A series is designed for heavy-duty boiling and is made from \u003c\/span\u003e\u003cspan class=\"citation-101\"\u003eCode 7740 borosilicate glass\u003c\/span\u003e\u003cspan class=\"citation-101\"\u003e, which offers excellent resistance to \u003c\/span\u003e\u003cspan class=\"citation-101\"\u003ethermal shock\u003c\/span\u003e\u003cspan class=\"citation-101 citation-end-101\"\u003e and chemical attack. The Kontes (DWK Life Sciences) 294000-0500 is precision-engineered glassware often preferred for its highly accurate joint grinding, ensuring a superior vacuum seal.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-101 citation-end-101\"\u003eUsed, in great condition.\u003c\/span\u003e\u003c\/p\u003e","brand":"Life Sciences Trading","offers":[{"title":"Default Title","offer_id":48763429126396,"sku":"10347","price":80.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/assorted-pyrex-and-kontes-single-neck-round-bottom-flask-500-ml-1420-stj-lot-of-2-flasks-life-sciences-trading-107387.jpg?v=1770838554","url":"https:\/\/lifesciencestrading.com\/zh\/products\/assorted-pyrex-and-kontes-single-neck-round-bottom-flask-500-ml-14-20-stj","provider":"Life Sciences Trading","version":"1.0","type":"link"}