Labconco Flask Freeze Dry 150ML Bottom. The freezable design and hinged lip prevent breakage and aide in faster freeze-drying. Supplied with a sealing ring on the neck. The polyethylene stopcock provides a tight seal when the flasks are assembled. The freezable lip prevents breakage and aids in the recovery of sublimated gases. The polyethylene stopcock is o-ring sealed and may be manually operated with gloves. The polyethylene stopcock is inserted into the flask from the top or the bottom. The stopcock serves as a mechanical closure to prevent leakage. Specifications for Labconco Flask Freeze Dry 150ML Bottom 7542400 : Description: FLASK FREEZE DRY 150ML BOTTOM (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Labconco 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 Labconco 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 Labconco Flask Freeze Dry 150ML Bottom 7542400/ 72460-044 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Labconco. We also carry a full line of Labconco accessories to help meet your laboratory and scientific needs. For a complete selection of Labconco Beakers Test Tubes Flasks & Accessories please visit our Labconco 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. Labconco Flask Freeze Dry 150ML Bottom 7542400