For 550g PPS filter bags, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our 550g PPS filter bags has been well received by many customers and enjoyed a good reputation in many countries. Aokai Envirotec 550g PPS filter bags have characteristic design & practical performance & competitive price, for more information on the 550g PPS filter bags, please feel free to contact us.