-
5L Round Bottom Receiving Flask - 3 neck 2 - 24/40 and 34/45 Center
USA LabRBF5L3NECK-2434$170.00Our 5L 3 Neck Round Bottom Flask is constructed with 3.3 Borosilicate Glass with 2 - 24/40 and 1 - 34/45 neck for a durable, common size receiving flask to use. -
-
USA Made 1 Neck Round Bottom Flask - 24/40
USA Lab$65.00 - $399.00The Round Bottom Flask Made in the USA is your classic RBF, except its made of one of the highest rated glasses in America.
Description
USA Lab 2 Neck Round Bottom Flask - Borosilicate 3.3 Glass
The USA Lab 2 Neck Round Bottom Flask is constructed from high-quality Borosilicate 3.3 glass, providing excellent chemical resistance, thermal durability, and optical clarity for laboratory, research, distillation, reflux, and reaction applications.
Designed with a round bottom body for uniform heat distribution, this flask is ideal for chemical synthesis, solvent recovery, heating, distillation setups, and general laboratory processing. The dual-neck design allows users to connect multiple glassware components at once, making it useful for setups requiring condensers, thermometers, adapters, addition funnels, stoppers, or other compatible lab accessories.
Available in multiple configurations, the USA Lab 2 Neck Round Bottom Flask includes 24/40 joint options as well as larger capacity options including 250ml, 500ml, 1L, 2L, 5L, 10L with center neck options of 24/40, 34/45, or 45/50.
Available sizes: 250ml, 500ml, 1L, 2L, 5L, 10L
Center neck options: 24/40, 34/45, or 45/50.
Borosilicate 3.3 Glass 2 Neck Design Round Bottom Flask 24/40, 34/45 & 45/50 Options
Material: Premium Borosilicate 3.3 glass for chemical and thermal durability.
Design: Dual-neck round bottom flask for connecting multiple glassware components.
Options: 250ml, 500ml, 1L, 2L, 5L, 10L sizes with 24/40, 34/45, or 45/50 center neck options.
Why buy from USA Lab
Expert Support
Engineers & technicians on staff.
Engineers & technicians on staff.
Quality First
Tested and trusted products.
Tested and trusted products.
Fast Fulfillment
Nationwide 1-2 day shipping.
Nationwide 1-2 day shipping.
Warranty & Parts
US-based service & spares.
US-based service & spares.
Resources & Downloads
Why choose the USA Lab 2 Neck Round Bottom Flask?
- Premium glass construction — made from Borosilicate 3.3 glass for excellent chemical resistance and thermal durability.
- Dual-neck versatility — connect condensers, thermometers, adapters, addition funnels, stoppers, and other compatible components.
- Uniform heat distribution — round bottom design supports efficient heating, mixing, and reaction performance.
- Multiple joint options — available with 24/40 options and larger center neck options of 34/45 or 45/50.
- Larger lab workflows — available in 250ml, 500ml, 1L, 2L, 5L, 10L sizes for benchtop and scale-up processing.
Talk to an expert
Get help choosing the right flask size, center neck option, or compatible glassware components for your setup.
Technical Specifications
| Model | USA Lab 2 Neck Round Bottom Flask |
|---|---|
| Product Type | 2 Neck Round Bottom Flask |
| Material | Borosilicate 3.3 Glass |
| Available Sizes | 250ml, 500ml, 1L, 2L, 5L, 10L |
| Neck Style | Dual Neck / 2 Neck |
| Center Neck Options | 24/40, 34/45, 45/50 |
| Appearance | Clear Laboratory Glass |
| Common Uses | Distillation, Reflux, Chemical Synthesis, Solvent Recovery, Heating, Reaction Setups |
| Chemical Resistance | Excellent Chemical Resistance |
| Thermal Durability | Designed for Repeated Heating and Cooling Cycles |
| Heat Transfer | Uniform Heat Distribution |
| Applications | Laboratory, Research, Educational, Industrial |
Popular Industries & Use Cases
Business Solutions & Procurement
Programs & Terms
Exclusive options for businesses and academics.
Documentation & Compliance
Keep purchasing streamlined and compliant.
Custom Solutions
Tailored tanks, skids, and integration help.
Talk to Sales
We’ll help spec the right glassware and lab supplies for your workflow.
FAQ
What is the USA Lab 2 Neck Round Bottom Flask made from?
The USA Lab 2 Neck Round Bottom Flask is made from high-quality Borosilicate 3.3 glass for excellent chemical resistance, thermal durability, and optical clarity.
What sizes are available for the USA Lab 2 Neck Round Bottom Flask?
The USA Lab 2 Neck Round Bottom Flask is available in 250ml, 500ml, 1L, 2L, 5L, 10L sizes for benchtop and larger-scale laboratory workflows.
What center neck options are available for the USA Lab 2 Neck Round Bottom Flask?
The USA Lab 2 Neck Round Bottom Flask is available with center neck options of 24/40, 34/45, or 45/50, depending on the selected configuration.
What is the USA Lab 2 Neck Round Bottom Flask used for?
The USA Lab 2 Neck Round Bottom Flask is commonly used for distillation, reflux, chemical synthesis, solvent recovery, heating, reaction setups, and multi-component laboratory glassware assemblies.
Important Shipping Notice!
DISCLAIMER:
All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.
Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.
×
Email Sales & Support
We usually reply same business day.
×
Technical Support
Share details and our techs will follow up.
×
Request a Quote
Tell us what you need and we’ll respond quickly.
