Superior Grade Filters for a Variety of Biological and Environmental Methods-Type A/E meets the requirements for suspended solids testing, as described in Standard Methods for the Examination of Water and Wastewater, current edition.-Reduces filtration costs and premature clogging when filtering difficult-to-filter or highly contaminated solutions.-Extends filter life and reduces final filter changes with high capacity prefilters.-Eliminates sample contamination. Binder-free borosilicate glass fiber has no added extractables.-Filters a wide range of particulate loads and viscous solutions with a selection of filter thicknesses from which to choose.-Filters with binder offer excellent wet strength for easy handling and filter integrity. This product is not approved for use in medical, clinical, surgical or other patient applications.