United Scientific® #13 Solid Glass Pennyhead Stopper – Borosilicate 3.3 Ground Joint for Flasks & Funnels

{ "44207934439560": { "extra_description": "The United Scientific® Solid Glass Pennyhead Stopper #13 is designed for a secure and leak-proof seal on ground joint glassware such as flasks and separatory funnels. Crafted from high-quality borosilicate 3.3 glass, this pennyhead stopper is resistant to thermal shock and chemical corrosion. Its precisely ground joint ensures a tight, interchangeable fit, ideal for ASTM standard lab equipment. Perfect for labs requiring durability and precision sealing." }, "44207934472328": { "extra_description": "Ensure a reliable seal for your laboratory glassware with the United Scientific® Solid Pennyhead Stopper #16. Engineered with a precision-ground joint, this stopper fits seamlessly with ASTM standard flasks and funnels. Made from durable borosilicate 3.3 glass, it provides excellent chemical and thermal resistance, making it a dependable choice for lab use." }, "44207934505096": { "extra_description": "The United Scientific® Solid Glass Stopper #19 delivers dependable sealing for a variety of ground-joint labware, including flasks and funnels. Constructed from high-grade borosilicate 3.3 glass, it ensures resistance to thermal changes and chemical exposure. Its pennyhead design allows for easy handling, while the precision-ground joint provides a tight, reusable fit." }, "44207934537864": { "extra_description": "Designed for laboratory precision, the United Scientific® #22 Solid Pennyhead Stopper fits ASTM standard flasks and funnels with a matching ground joint. Manufactured from strong borosilicate 3.3 glass, it resists chemical wear and high-temperature conditions. The sealed bottom and ergonomic pennyhead design allow for safe, reliable, and repeatable use in lab environments." }, "44207934570632": { "extra_description": "Seal your labware with confidence using the United Scientific® Solid Glass Pennyhead Stopper #27. This stopper is precision-crafted from borosilicate 3.3 glass to provide a strong, airtight seal on standard ground-joint glassware. It’s ideal for flasks, separatory funnels, and other jointed equipment requiring consistent performance under harsh lab conditions." } }

{ "44207934439560": { "extra_keyfeatures": "Precision #13 ground joint for leak-proof sealing Made from durable borosilicate 3.3 glass Resistant to heat and chemicals Ideal for use with flasks and separatory funnels" }, "44207934472328": { "extra_keyfeatures": "Compatible with ASTM standard glassware (#16 joint) Borosilicate 3.3 glass for chemical durability Heat-resistant and corrosion-proof Provides secure, interchangeable sealing" }, "44207934505096": { "extra_keyfeatures": "Ground joint #19 for consistent fit Durable borosilicate 3.3 glass construction Ideal for flasks, funnels, and jointed labware Easy-grip pennyhead top design" }, "44207934537864": { "extra_keyfeatures": "Standard #22 ground joint compatibility Heat and chemical resistant borosilicate glass Pennyhead top for easy handling and removal Perfect fit for flasks, funnels, and jointed labware" }, "44207934570632": { "extra_keyfeatures": "Fits ASTM standard glassware with #27 joint Borosilicate 3.3 glass for maximum durability Airtight, reusable, and easy to clean Ideal for high-temperature or corrosive environments" } }