Dimensions
Diameter: 125mm (4 15/16")
Length: 338mm (13 5/16")
Top: Interior diameter 54mm (2 ⅛")
Bottom: Interior diameter 54mm (2 ⅛")
Filtration surface area: 25 square feet (106 pleats)

Note that this filter is exactly the same size as the PRB50 / C-4950 model, but it has half as many pleats and therefore half the surface area. The two models are completely interchangeable, but if you are in any doubt about which filter to use, we suggest that you stick with the version that was originally supplied with your spa.

Spa manufacturers who use this filter
Accent Spas, Angels Spas, Arctic Spas (Blue Falls Manufacturing), Beachcomber, Canadian Spas, Coast Mountain, Coleman Spas, Coyote Spas, Dakota Spas, Emerald Spas, Honey Tubs, Hot Spot Spas, Hot Springs Spas, Jacuzzi Premium, Kanebo, Nordic Hot Tubs, PDC Spas, Peips, Phoenix, Planète Spa, Rotospa, Signature Spas, Tiger River, US-Spas, Viking Spas, Vita Spa and many others.

Manufacturer part numbers for this filter
Pleatco: PRB25 or PRB25IN
Unicel: C-4326
Waterway: 817-2500
Filbur / Clarathon: FC2375

This filter is also available in Microban.
Microban inhibits the growth of bacteria on the surface of your hot tub filter. Microban filters stay clean longer and last longer than conventional spa filters.