Tank o-ring for Quad and Titan RPM filters. Other Products Using This Part: 160332 CCP520 Clean n Clear Plus 520sqft Cartridge Filter 160340 CCP320 Clean n Clear Plus 320sqft Cartridge Filter 160301 CCP420 Clean n Clear Plus 420sqft Cartridge Filter 188593 Quad 80 - 80sqft Combination Cartridge n DE filter 188592 Quad 60 - 60sqft Combination Cartridge n DE filter 180009 FNSP60 - FNS Plus 60sqft Vertical Grid D.E. Filter 180008 FNSP48 - FNS Plus 48sqft Vertical Grid D.E. Filter 180007 FNSP36 - FNS Plus 36sqft Vertical Grid D.E. Filter 160332 CCP520 Clean n Clear Plus 520sqft Cartridge Filter 160301 CCP420 Clean n Clear Plus 420sqft Cartridge Filter