NANTONG NAVIGATION MACHINERY.NA.G3-01654A PAPER CARTRIDGE FOR FLUSHING OIL FILTER 19 Comments: ME LO AUTOBACKFLUSH FILTER PAPER CARTRIDGE MODEL SK451-ND250 CARTRIDGE LENGTH 250MM DIAMETER 65MM Part No. G3-01654A For: FILTER LUBRICATING OIL Type: 6.33i+sk451 Man: NANTONG NAVIGATION MACHINERY GROUP CO.