Controlled media specifications : Predictable Performance for desired filter effluent quality. Manufacturing Processes do not use silicone or adhesives. Controlled media specifications = Control of fluid bypass through proper sealing into most filter bag manufactur's housing's. Erogonomically designed handle for case of bag removal . Grade & lot information etched on collar for identification & traceability. Welded side seams & thermal treated exterior surfaces = Control of fiber migration and subsequent downstrem fluid contamination.