PFF50P4 filter / Freeflow Spas

Dimensions
Diameter: 135 mm (5-5/16")
Length: 254 mm (10")
Top: 54 mm hole
Bottom: 2" MPT thread

The length of the filter excludes the thread.

Spa manufacturers who use this filter cartridge
Freeflow Spas

Part numbers
Pleatco: PFF50P4
Unicel: 5CH-45
Filbur: FC-2401