These borosilicate glass fibers without binder can be used in the Zero Headspace Extractor for volatiles analysis, or in hazardous waste filtration units. They are designed to meet nominal 0.6 to 0.8µm pore size requirements for US EPA Method 1311 Toxicity Characteristics Leaching Procedure (TCLP). Various diameter filters with a pore size of 0.7µm. Typical thickness is 432 µm (17 mils). Provided with a Certification of Metals Analyses for US EPA Method 1311.