produced by Hawach Scientific Co., Ltd is divided into three series, FILTSTAR syringe filters, WINSTAR syringe filters, and STERILE syringe filters. The biggest difference between the three series of products is the adopting different membranes. FILTSTAR syringe filters adopt membranes imported from Germany and the United States. WINSTAR syringe filters adopt membrane products from domestic advanced suppliers. STERILE syringe filters adopt sterile membranes.