Cowie Beakers PTFE 00 Covers. One of these advantages is that PTFE won't react with most acids and bases including those containing a catalyst reducing the possibility of product etching or chemical attack. Beakers have a polytetrafluoroethylene (PTFE) content throughout the entire volume eliminating glass-on-glass contact between acids and bases. Beakers also have a PTFE lid with a Class VI (DIN) cover. Beakers with the larger sizes are intended for batch production of hot distilled water whereas the smaller sizes are for diluted or acetate-blended solutions such as for use with concentrated aqueous solutions. To ensure purity only use a Coley filter with a Class VI PTFE element. Specifications for Cowie Beakers PTFE 013.040 Covers : Capacity mL: Fits 25 DimensionsO.D. x Height mm: Unit: Pack of 4 (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Cowie 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 Cowie 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 Cowie Beakers PTFE Covers 013.040/ 89026-444 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Cowie. We also carry a full line of Cowie accessories to help meet your laboratory and scientific needs. For a complete selection of Cowie Beakers Test Tubes Flasks & Accessories please visit our Cowie 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. Cowie Beakers PTFE 013.040 Covers