Made of borosilicate glass fiber without binders or with binder. •Stability at high temperatures: It keeps its properties up to 500 ºC and 180 ºC for Grade GF10. •Usable as Pre-filter for membranes to prevent the membranes from silting up. •Large surface area provides an outstanding retention capacity. •High flow speed and high permeability to air. •Reduce filtration costs and premature clogging when filtering difficult-to-filter or highly contaminated solutions. •Excellent wet strength for easy handling and filter integrity.