General description These 16 reusable and washable foam filters are designed specifically for Pure Spa hot tubs, suitable for both bubble and jetted models. They serve as a replacement for the S1 carton filters, making them an essential part of your pool's daily maintenance. The foam filters are cost-effective, as they can be washed and reused multiple times, extending their lifespan compared to traditional paper filters. Technical specifications Size: 10.8 x 7.3 cm Center hole diameter: 4 cm Material: Sponge Color: Blue Measurement allowed error: +/- 1-3 cm Package Contents 16 x Filter Sponges Other information