New, high-quality materials, well-made, durable, and highly compatible with the equipment. Clean accessories keep your home robot operating at peak performance. The contents of the accessories are easily removed and replaced as part of routine maintenance. Also reduces the infiltration of dust, pollen and other allergens into the air you breathe. In order to achieve the best cleaning and filtering effect, the cleaning accessories should be replaced every 2-3 months depending on the frequency of use. Compatible with units: CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP702, HAP706, HAP716, HAP1702, HAP2400, HAP9240, HAP9241, HAP9242, HAP9243, HAP9412, HAP9413, HAP9414, HAP9415, HAP9422, HAP9423, HAP9424, HAP9425 CARBON BOOSTER PRE-FILTER: Absorbs household odors from pets, cooking, and smoking. And traps larger airborne contaminants like hair and lint Type: Purifier Accessories Color: as shown Material: Plastic Package Contents: 4 * Filter 8 * Filter Cotton Only the