Grade 934-AH® is the standard for sampling suspended solids content and related measurements (Standard Methods 2540D and EPA Method 160.2). Made from a binderless borosilicate glass microfiber that enables use up to 550° C while featuring a fine porosity, fast flow rate, and a 1.5μm size particle retention. Glass Fiber Filters, 934-AH® in sizes ranging from 25mm through 8″ x 10″ sheets. Fine porosity, fast flow rate, with a 1.5µm size particle retention. This material is the standard for suspended solids content and related measurements (Standard Methods 2540D and EPA Method 160.2). Also widely used in cell harvesting applications and RIA scintillation counting. Grade 934-AH® is a binderless borosilicate glass microfiber which enables use up to 550° C.