{"product_id":"hirschmann-hollow-glass-stoppers-ns-12-22","title":"Hirschmann Hollow Glass Stoppers NS 12\/21","description":"\u003ch4\u003e\u003cstrong\u003eHirschmann Hollow Glass Stoppers NS 12\/21\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eHirschmann Hollow Glass Stoppers are designed to provide a secure and airtight seal for laboratory glassware featuring standard ground joints. These stoppers are essential for preventing evaporation, contamination, and the escape of vapours during chemical reactions, sample storage, or distillation processes. Manufactured from high-quality glass, they ensure chemical compatibility and thermal resistance across a variety of laboratory workflows.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision-ground joints ensure a leak-proof and reliable seal with compatible glassware.\u003c\/li\u003e\n\u003cli\u003eHollow construction reduces overall weight while maintaining structural integrity.\u003c\/li\u003e\n\u003cli\u003eHigh chemical resistance suitable for use with aggressive reagents and solvents.\u003c\/li\u003e\n\u003cli\u003eStandardised NS dimensions for universal compatibility with matching ground-joint apparatus.\u003c\/li\u003e\n\u003cli\u003eErgonomic head design allows for easy insertion and removal during experiments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSealing volumetric flasks and reagent bottles during storage.\u003c\/li\u003e\n\u003cli\u003eClosing distillation apparatus and reaction vessels in organic synthesis.\u003c\/li\u003e\n\u003cli\u003ePreventing sample contamination in analytical chemistry procedures.\u003c\/li\u003e\n\u003cli\u003eSecuring volatile substances within standard ground-joint glassware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eJoint Size: NS 12\/21\u003c\/li\u003e\n\u003cli\u003eMaterial: Borosilicate glass\u003c\/li\u003e\n\u003cli\u003eDesign: Hollow\u003c\/li\u003e\n\u003cli\u003eStandard: DIN 12252\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eDisclaimer\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eEnsure that the ground joint surfaces are clean and free of debris before use to maintain an effective seal. Lubrication may be required for certain vacuum or high-temperature applications.\u003c\/p\u003e","brand":"Hirschmann","offers":[{"title":"NS 12\/21 \/ Glass \/ Clear \/ Unit \/ New - Unopened (Sealed)","offer_id":54212160848199,"sku":"10499631","price":2.53,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0802\/7245\/8055\/files\/convert_e4cc6308-1871-4d4e-a144-889ffb0ea078.png?v=1782198171","url":"https:\/\/checkout.wasteless.bio\/products\/hirschmann-hollow-glass-stoppers-ns-12-22","provider":"Wasteless Bio","version":"1.0","type":"link"}