... steel mesh,Glass fiber,Filter paper,active carbon filter cartridge Model Description2.1. GU-H With Check Valve Pressure Line Filter Series ... -1000×*(* stand for 1,3,5,10,20,30 separately)2.4 .XU-A Return Filter Series Cartridge Filter ModelTXX-25×* TXX ... ×* (* stands for 1,3,5,10,20,30 separately)2.17. SRFA Duplex Tank Mounted Mini-Type Return Filter Cartridge FilterModelSFAX-25 ...