Offers a full range of glass microfiber filters manufactured from 100 percent pure borosilicate glass. Because of their intrinsic properties, glass microfiber filters have wide applications in many areas of laboratory analysis, especially when fine filtration and high loading capacity is required. Applications for glass microfiber filters include environmental analysis for water, wastewater, testing of soils, air pollution and monitoring, research and process biochemistry, and gravimetric analysis involving ignition of samples. Glass microfiber filters are also found in the filtration of hot gases and liquids, and in pre-filtration. Laboratory analysis, 100 percent pure borosilicate glass, rapid flow rate, fine particle retention 0.7 micrometer - 3.1 micrometer, high loading capacity, chemical and thermal resistance (up to 500 percent C), long shelf life, brilliant white color reflecting more than 96 degree of visible light, custom cut. Standard glass microfiber filters contain no binders or other additives that may cause interference to sensitive enzymatic or other chemical reactions. The unique characteristics of glass microfiber filters make its use particularly advantageous to laboratory filtration by enabling fast filtration of large volumes and difficult solutions without premature clogging. This high performance grade is designed to retain extremely fine particles down to 0.7 micrometer. Grade 151 has retention comparable to membrane filter while providing higher flow and loading capacity. Grade 151 is recommended for filtering fine precipitated proteins. In the filtration of nucleic acids and difficult biochemical solutions, Grade 151 is used in combination with Grade 141 as a highly efficient protective and retentive pre-filter to extend the loading capacity of membrane filters. Grade 151 is recommended for use in TCLP procedure as described in test methods for evaluating solid wastes, EPA method 1311.