This is an open box item. There is a piece of plastic broken on top as shown in the photo.. However, the item is brand new and as you can see, the filter is new. Pentair Clean & Clear Pool Cartridge Filters feature a chemical resistant tank with No-tool servicing and a core-less cartridge for easier cleaning. Unionized connections Integrated continuous High Flow internal air relief Chemical resistant tank body Lock ring with spring-loaded safety latches Coreless cartridge for easy cleaning High Flow manual air relief valve 1-1/2″ drain and wash out Single piece base and body design Cartridge is easy to remove and rinse 2″ plumbing for maximum flow Clamp ring allows safe and easy access to cartridge and internal parts Certified to NSF/ANSI 50.