TW sterility test kits is elaborately made through more than 50 strictly-inspected processes, and all products has experienced 100% completeness examination and met the ISO9001 quality system requirements, thus achieving quality tracking and constant quality improvement. Based on nature and packing of test articles, a variety of millipore membranes of different materials and structures are chosen to develop 34 kinds of sterility test kits, used to carry out sterility inspection for various test articles.