The 2014 GVS catalog with filtration products can be downloaded here.
DHI Lab Products has polycarbonate filters PCTE (25 & 47 mm, black and standard) with many different pore sizes in stock and supplies GVS Life Science filtration products.
GVS is one of the world leading manufacturers of filters and filtration products, e.g. former GE Osmonics/Poretic filters.
Please contact c14@dhigroup.com for more information.