0.45 Fiber Glass Filter found in: 25mm Glass Fiber Syringe Filters, SLHNM25NS, MILLEX® Nonsterile Syringe Filters Glass Fiber Membranes, EZFlow® Glass.. This 25 mm syringe filter with a Graduated Glass Fiber & Nylon membrane, for non-sterile filtration, has a 0.45 µm pore size used in clarifying of aqueous & mild organic solutions with high