PLF6CH-940 Hot Tub Filter compatible for Unicel 6CH-940, for Filbur FC-0359, for Pleatco PWW50, for Filbur FC-0359, for Waterways 817-0050. Please check your model for compatibility.<br> The thickened advanced trilobal fabric, helps to catch more contaminants, end caps are resistant to breakage, the enhanced center core make the entire filter cartridge have a longer service life.<br> Using a spray nozzle to rinse the filter cloth until it changes to white color under regular cleanings. Please clean the filters every 1-2 months.<br> Not universally compatible, please check the specific model.<br> new and High quality Filters.<br> For PWW50 hot tub & Spa Filter.<br> Compatible models:<br> For Unicel 6CH-940<br> For Pleatco PWW50<br> For Filbur FC-0359<br> For Waterways 817-0050<br> Colour:Blue & White<br> Material:PP<br> Package Contents:<br> 1 * hot tub filters replacement accessories<br> Only the above package content, other products are not included.<br> 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.