ADVANTAGES OF REUSABLE FILTER SLOTS - Reusable and easy to replace. They make filters for your machine more cost-effective and help reduce plastic waste for a more environmentally friendly option. FOAM POLLEN & ULTRA FINE - The foam filter blocks large particulate matter. The ultra fine filter captures smaller particles. Use them together to help provide cleaner air. CLEAN AIR FOR A HEALTHIER ENVIRONMENT - This kit is designed to help improve air quality by reducing airborne particles, contributing to a cleaner living space. Color: Blue Material: Filter sponge Package Contents: 6 x Ultra Fine Filters 2 x Pollen Filters Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by up to +/- 1-3 cm.