This is a first-stage sediment filter for the FL-SF50 housings (4.5" x 40"). The FL-SF50 is the tall pre-filter upstream of the XL Carbon Tanks used in the Commercial RO Systems CX-Series.
Note that is is 2x longer and 2x wider diameter than the picture depicted.
Replacement Pleated Sediment Filter for CX4000-CX21000 Pre-Filter
