【Creality Falcon Smoke Purifier YW45 Proprietary Kits】Package Includes: Pre-filter *5, Activated Carbon Filter *1. Complete set size 7*7*3inch (17.8*17.8*7cm), fully compatible with Creality Falcon Smoke Purifier YW45. 【2-Layer Filtration System】2-in-1 Filtration System,Multi-layer filtration including premium activated carbon to achieve a 99.97%purification rate.We suggest you replace it every 3-6 months (depends on the use time and frequency).Pre-filter, Activated Carbon Filter, all three need to be used together, one is indispensable, combined with each other in order to better protect the air purifier better filtration. 【Activated Carbon Filter】Activated carbon filter absorb gases and unpleasant odors.It is the most important part of the filtration process. 【Pre-Filter】Captures larger visible particles such as accumulated dust.It is recommended to replace the filter elementwhen the service time reaches 7-15 days.When the surface of the filter element is covered with dirt that cannot be cleaned and its area ex-ceeds 70%, please replace the filter elements. 【Creality-YOU CAN TRUST】This Filter is the official peripheral derivatives for Smoke Purifier by Creality. We will provide safe products throughout the process., Weight: 1.6 pounds, Manufacturer: Creality