(1)Different surface treatment for option, Sanblasting&polishing , After polishing the media contact surface reached 0.6um, close to the sanitary requirement. (2)For cartridge number under 7, We use the Tri-Clamp hoop design, it is easy to open the lid, easy operation and routine maintenance ,Multi-core large flow use bolt locking structure, its unique mechanical spring design, allowing the easily operation when changing the filter cartridge. (3)Full range of filter cartridges number : 1-150pc (4)Muti cartridge socket for option, DOE 222 226 type