PLF6CH-940 Hot Tub Filter compatible with Unicel 6CH-940, Filbur FC-0359, Pleatco PWW50, and Waterways 817-0050. Please check your model for compatibility. The thickened advanced trilobal fabric helps capture more contaminants. End caps are resistant to breakage, and the enhanced center core contributes to a longer service life. Use a spray nozzle to rinse the filter cloth until it turns white during regular cleanings. Clean the filter every 1-2 months. Not universally compatible; please verify your specific model. New and high-quality filter. Designed for PWW50 hot tub and spa systems. Compatible models: Unicel 6CH-940 Pleatco PWW50 Filbur FC-0359 Waterways 817-0050 Color: Blue and White Material: Polypropylene (PP) Package Contents: 1 x Hot tub filter replacement Note: The package includes only the items listed. Other products are not included. Light reflection and display differences may cause slight variations in color appearance. Measurement error allowance is +/- 1-3 cm.