Glas-Col Hemispherical Mantles Series O Glas-Col Glass Fabric Exterior. An essential tool for use with all Glas-Col transport vessels these Laboratory Equipment by Glas-Col are crafted from a proprietary fiberglass-reinforced silicone glass fabric exterior that withstands 450 C (840 F) internal operating temperature. Plus the exterior of these Glas-Col Hemispherical Adaptors are fire-polished to ensure safety during use. Choose from a glass fabric exterior or a silicone-impregnated glass fabric exterior depending on your precise needs. These Glas-Col Hemispherical Protective Mantles provide a tight fit without allowing any heat to escape. For best results these covers should be placed on the lowest part of the flask. When sealing out liquids apply firm pressure downward onto the neck of the vessel. When sealing out liquids slightly heat the neck of the vessel with a hair spray or grease the neck before placing the mantle on the bottle neck. After sealing reinserting the mantle to the neck is essential to ensure safety. Keeping your product safe can be a challenge. That's why Glas-Col offers these hemispherical mantles series O 100AO398 with a glass exterior and interior which are resistant to corrosion by moisture acids alcohol and most solvents. Since they are made to withstand heat these mantles can withstand up to 450 F internal operating temperature. In case of a fire these products can withstand up to 450 internal operating temperature. Keep one near the flame source but out of the way so that flames do not spread dangerously. Specifications for Glas-Col Hemispherical Mantles Series O Glas-Col 100AO398 Glass Fabric Exterior : For FlaskCapacity mL: 125 Maximum FlaskDiameter cm (in.): 7 (23/4) Exterior DimensionsO.D. x H cm (in.): 10.8 x 6.1 (41/4 x 23/8) Weightkg (lbs.): 0.41 (0.9) Electrical: 115V 60Hz 80W Glas-Col No.: 100AO398 Unit: Each (125 ML) (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Glas-Col products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Laboratory Apparatus with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Glas-Col Laboratory Apparatus. 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 Glas-Col Hemispherical Mantles Series O Glas-Col Glass Fabric Exterior 100AO398/ 33787-061 we carry a full complement of Laboratory Apparatus as well as other product offerings from Glas-Col. We also carry a full line of Glas-Col accessories to help meet your laboratory and scientific needs. For a complete selection of Glas-Col Laboratory Apparatus please visit our Glas-Col page. For more brand name Laboratory Apparatus please visit our Laboratory Apparatus store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Glas-Col Hemispherical Mantles Series O Glas-Col 100AO398 Glass Fabric Exterior