Hayward CX1380XRE/C1380E fits the Hayward C5500 and C5520 filter.  4 cartridges are required.

NOTE:  This product has limited availability and may require special order which can take 2-3 weeks.

Specifications
The Hayward CX1380XRE is an original manufacturer part. 
open w/molded gasket
For generic replacement parts. See UNICEL C-7490
Alternate part number as seen on cartridge top:  C-1380-E (C1380E)

Manufacturer
Hayward

Sq. Ft.
137

OD
7"

ID (Inside Diameter)
3"

Length
32-13/16"

See more Hayward pool filter products

Additional Information:
Hayward original cartridge pool filter elements are made of a superior reinforced polyester material.  They provide superior water clarity and their durability allow for longer filter cycles, which means fewer required cleanings and a longer life product.  To maintain your swimming pool water clarity and cleanliness, use a Hayward genuine pool filter.