Chemglass Round-Bottom Boiling Flasks Heavy Wall Chemglass. Chemglass round bottom boiling flasks feature heavy wall construction short necks ST outer joints and spouts designed for normal or bottom standing. Chemglass flasks are widely used in various laboratories due to their specific requirements for handling construction and chemical compatibility of the material used. The general design of these flasks provide for good heat transference which results in their usefulness for boiling and distilling operations. However chemical vaporization or boiling in vacuum a process may necessitate the use of some other container type such as a round bottom or anodic-acid digestor container. For other types of containers see the variety of Chemglass bottles and flasks. Specifications for Chemglass Round-Bottom Boiling Flasks Heavy Wall Chemglass CG-1506-21 : Capacity mL: 500 ST Joint Size: 29/42 Chemglass No.: CG-1506-21 Unit: Each (500 ML) (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Chemglass products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Beakers Test Tubes Flasks & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Chemglass Beakers Test Tubes Flasks & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Chemglass Round-Bottom Boiling Flasks Heavy Wall Chemglass CG-1506-21/ 80068-784 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Chemglass. We also carry a full line of Chemglass accessories to help meet your laboratory and scientific needs. For a complete selection of Chemglass Beakers Test Tubes Flasks & Accessories please visit our Chemglass page. For more brand name Beakers Test Tubes Flasks & Accessories please visit our Beakers Test Tubes Flasks & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Chemglass Round-Bottom Boiling Flasks Heavy Wall Chemglass CG-1506-21