{"product_id":"teflon-stopcock-graduated-constant-pressure-dropping-funnel-14-20-joint-10ml-25ml-60ml-125ml-copy-1","title":"Glass Constant Pressure Graduated Addition Funnel with Glass Stopcock 14\/20 Taper Joint","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAchieve accurate, controlled dropwise addition of reagents under closed or inert conditions with our Glass Constant Pressure Graduated Addition Funnel. Crafted from high-quality borosilicate 3.3 glass, this funnel features a ground glass stopcock and a 14\/20 standard taper joint for secure, leak-resistant connections. The pressure-equalizing side arm equalizes pressure between the funnel and the reaction vessel, ensuring smooth, consistent flow without the need for repeated venting—ideal for air-sensitive and moisture-sensitive reactions. The clear glass body is graduated with easy-to-read volume markings, allowing precise monitoring of liquid addition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAvailable in 10ml, 25ml, 60ml and 125ml capacities, this addition funnel is an excellent choice for organic synthesis, pharmaceutical research, and any laboratory procedure requiring controlled reagent delivery, especially where a glass stopcock is preferred over PTFE for compatibility or traditional setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eKey Features \u0026amp; Benefits:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eConstant Pressure (Equalizing) Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e The integral side arm balances pressure between the funnel and the reaction flask, enabling steady dropwise addition and preventing backpressure or vacuum issues.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGround Glass Stopcock:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides smooth, precise flow control. Chemically resistant and ideal for applications where PTFE may not be suitable. Interchangeable for easy replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGraduated Body:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Clear volume markings on the borosilicate glass allow for accurate monitoring of liquid dispensed and remaining.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e14\/20 Standard Taper Joint:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ensures a tight, leak-resistant fit with 14\/20 compatible flasks, adapters, and stoppers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePremium Borosilicate 3.3 Glass:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Excellent thermal shock resistance and chemical durability for long service life.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMultiple Capacity Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Choose from 10ml, 25ml, 60ml or 125ml to suit your specific reaction scale.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAutoclavable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Suitable for standard sterilization procedures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SYNTHWARE","offers":[{"title":"10ml","offer_id":45657913819312,"sku":"P06703","price":45.99,"currency_code":"USD","in_stock":true},{"title":"10ml x 4Pcs","offer_id":45657913852080,"sku":"P06704","price":100.0,"currency_code":"USD","in_stock":true},{"title":"25ml","offer_id":45657913884848,"sku":"P06705","price":47.99,"currency_code":"USD","in_stock":true},{"title":"25ml x 4Pcs","offer_id":45657913917616,"sku":"P06706","price":110.0,"currency_code":"USD","in_stock":true},{"title":"60ml","offer_id":45657913950384,"sku":"P06707","price":49.99,"currency_code":"USD","in_stock":true},{"title":"60ml x 4Pcs","offer_id":45657913983152,"sku":"P06708","price":120.0,"currency_code":"USD","in_stock":true},{"title":"125ml","offer_id":45657914015920,"sku":"P06709","price":55.95,"currency_code":"USD","in_stock":true},{"title":"125ml x 4Pcs","offer_id":45657914048688,"sku":"P06710","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/8512\/0944\/files\/PressureEqualizeGlass14-20-60ml.png?v=1791173135","url":"https:\/\/scientificsupplydirect.com\/products\/teflon-stopcock-graduated-constant-pressure-dropping-funnel-14-20-joint-10ml-25ml-60ml-125ml-copy-1","provider":"Scientific Supply Direct Corp.","version":"1.0","type":"link"}