Whatman Grade No. 1 Filter Paper Whatman. 1 Filter Paper is pre-saturated with a binder resin that prevents binder from settling out of porous materials. Whatman Grade No. 1 Filter Paper is primarily intended for use with heavier compounds and sediments which require a high degree of retention. Whatman Grade No. 1 Filter Paper is particularly recommended for the pre-concentration and pre-filtration stages of distillation procedures. Whatman Grade No. 1 Filter Paper is widely used in laboratories for the pre-concentration of gases and liquids in pressure accumulation and weighing stages of distillation procedures. Whatman Grade No. 1 Whatman Filter Paper may also be used in a number of other applications requiring a high degree of precision. Specifications for Whatman Grade No. 1 Filter Paper Whatman 1001-070 : Size cm: 7.0 dia. Whatman No.: 1001-070 Unit: Pack of 100 Porosity: Medium Flow Rate: Medium Particle Retention: 11 m (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 Grade No. 1 Filter Paper Whatman 1001-070/ 28450-070 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 Grade No. 1 Filter Paper Whatman 1001-070