This is a Hurricane Filters 4 Pack HF7489-04 Advanced Pool Filter Cartridge C4500. It is new in box. Free shipping from US seller.
The Hurricane HF7489-04 Advanced Cartridge Filter is compatible for Unicel: C-7489, PA112, Filbur: FC-1275, Hayward Super-Star-Clear C-4500, SwimClear C-4520, CX875XRE, Pentair Purex CF 105 and other compatible models.
Length 25.5 inches, outer diameter 7 inches, Top hole 3 inches, Bottom hole 3 inches. Measure your current filter's dimensions if you're unsure of product fit.