Usage Tips:[Replacement Models]Compatible with C-4326, FC-2375, PRB25-IN, 303909, M-4326, 8172500, R173429, 5X13 inline hot tub filters. NOTE: All manufacturer names and part numbers are the property of their respective owner(s) and are used for compatibility information only. woreed is an independent brand. [Specifications] Length 13 5/16inch; outer diameter 5inch; bottom hole 2-1/8inch; top hole 2-1/18inch; filter area: 25 square feet. [Easy Cleaning]The improved trilobal fabric filter structure allows impurities to penetrate deeply into the filter pleats during cleaning, making the filter look brand after cleaning. It is recommended to clean the filter when the pressure gauge reaches a predetermined value to maximize its performance. [Quality Assurance]We attach great importance to all customers' perfect experience with our products. And we are equipped with professional customer service to provide technical support to every customer. [Long Service Life]The filter adopts sturdy end caps and qualified materials and is reusable. Ensure longevity, durability and quality. Colour:Photo Color Material:PET Package Contents: 2 x filter elements Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.