Feature:*Replaceable washable sponge pool filter has good flexibility and ductility. *Made of high-quality sponge, which can be used repeatedly for a long time. It is recommended to replace the Washable Foam Hot Tub Filter once a week, that is, after cleaning once a week, put it back.*The length of the sponge foam cartridge is 7.3 cm/2.87 inches, the diameter is 10.8 cm/4.25 inches, and the inner diameter is 4 cm/1.57 inches; small size, easy to carry, store and replace*These foam filter could help to cleaning pool,and prolong the life of your filter media,provide efficient water flow with less clogging for long lasting filtration and cleaning*Regular replacement of the filter element as a daily maintenance of the swimming pool may cause high expenses. These washable sponge pool filters can effectively reduce your costs.Specification:*Fitment:For S1 VI*Material: Sponge*Color: Blue*Quantity:6pcs/12pcsPackage includes:6PCS Filter Sponge OR 12PCS Filter Sponge