Keep your inflatable hot tubs clean and crystal clear all year long with the Bestway Type VI Filter Pump Replacement Cartridges. Measuring 4.2 by 3.1 inches, these specific filters are designed for Bestway's line of SaluSpas. Featuring a lightweight design that is incredibly easy to clean, these replacement cartridges help maintain healthy water without the hassle of long maintenance work. These fresh cartridges filter the water in your spa to keep it attractive and refreshing all season for friends and family to enjoy. Ensure the long life of your backyard hot tub and filter pump by replacing the filter regularly. For best performance, it's recommended to replace your filter cartridges once every 2 weeks. When they get dirty, easily clean the filters by rinsing them with the garden hose, and they're good to go. Relax and have fun in your spa, knowing it's as clean as can be with the help of the SaluSpa Type VI Inflatable Hot Tub Replacement Cartridge from Bestway.