Micro fiberglass, Exacting efficiency for desired particle size fibreglass, also called micro glass is a type of synthetic filter media. Fiberglass hydraulic filtrations are considered to provide the best filtration quality. They are made by bonding micro-fiberglass material with resin which is randomly set into a multi-layer composite. Multiple thickness and stiffness options are available to tailor the composite to your application needs. Because of the finer weave as well as the presence of multiple layers, this type of filter is more efficient at capturing fine particulate matter and has a much greater dirt-holding capacity than cellulose filter elements.