Certified sterile millex gv factory South Africa Millex® Syringe Filter Units, Sterile, 4/3/25mm Sterile 4mm Millex filters, perfect for small sample sizes. 3mm Millex filters, for processing 0mL. 25mm Millex filters come in several merane types suitable for filtration and venting purposes Find MSDS or SDS, a COA, data sheets and more information.