... inside the structure 2.large specific surface area 3.high mechanical strength Introduction:Ceramic grain filters are made of refined pottery clays added ... in chemical and gbiologic property, and long service life. Ceramic grain filters is a new and efficient filter material to increase the ... contained Product Sizes (mm): Φ0.5~1, Φ1~2, Φ2~3 , Φ3~5, Φ3~5, Φ5~6, Φ6~8, Φ8~9, Φ9~10 ...