VWR Corks. Corks offer reliable performance with low breakage and excellent chemical resistance. For use with VWR safety-cork jars including the use of a magnetic stirring bar. All feature VWR engraved identification label. Nonsterile safety corks are designed with a small area of extra thick material across the entire top surface of the cork. Designed with a slightly broader bottom section to provide improved grip and an increased sealing area when the cork is fully submerged in water or other liquids. Designed with an enlarged handle to provide more leverage for corking large jars. Specifications for VWR Corks 51724 : Number: 17 DiameterTop mm: 36 DiameterBottom mm: 29 Lengthmm: 38 (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Manton Cork products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Laboratory Consumables with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for VWR Laboratory Consumables. 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 VWR Corks 51724/ 23420-413 we carry a full complement of Laboratory Consumables as well as other product offerings from Manton Cork. We also carry a full line of VWR accessories to help meet your laboratory and scientific needs. For a complete selection of VWR Laboratory Consumables please visit our Manton Cork page. For more brand name Laboratory Consumables please visit our Laboratory Consumables store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. VWR Corks 51724