Size: 0.5-32mm Big Void , Large Surface Area,easily packed ISO9001:2008 Filtration materials of porcelain sand has the merit of steady ... function, ant-blasting, wear resisting, strong head resisting the size of product is uniform, damming the impurities very well, solving that ... electric power and infrastructure expense.2. Because of even and regular in particle size, making it easy to be cleaned, the ...