Whatman Polydisc TF Disposable Disk Filters Whatman. Many commercial alkaline battery charging solutions contain alkaline reagents that react with neoprene to produce a cleaning solution. Alkaline reagents require a long time to develop a precipitate. This product has a very short life span and should be disposed of after each use or when the alkaline solution begins to deteriorate. Whatman alkaline cellulose paper filters are very cheap but very absorbent and so it is important to maintain the suction power needed to draw the solution up to a certain point. Whatman alkaline battery charging paper filters should not be used for the recovery of alkaline batteries. Alkaline battery charging paper filters should not be used for the recovery of alkaline batteries. Specifications for Whatman Polydisc TF Disposable Disk Filters Whatman 6720-5002 : PoreSize m: 0.2 FilterMedia: PTFE Whatman No.: 6720-5002 Unit: Pack of 10 (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Whatman products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Filters with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Whatman Filters. 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 Whatman Polydisc TF Disposable Disk Filters Whatman 6720-5002/ 28137-852 we carry a full complement of Filters as well as other product offerings from Whatman. We also carry a full line of Whatman accessories to help meet your laboratory and scientific needs. For a complete selection of Whatman Filters please visit our Whatman page. For more brand name Filters please visit our Filters store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Whatman Polydisc TF Disposable Disk Filters Whatman 6720-5002