General description With the vhbw combi filter replacement for the Xiaomi SCG4021GL air purifier, you can ensure a highly efficient filtration performance. This high-quality filter combines a pre-filter, HEPA filter, and activated carbon filter to effectively capture up to 99.97% of dust, pollen, smoke, odours, and pet hair from your household air. Technical specifications Filter class: H12 Diameter: 20 cm Internal diameter: 11.7 cm Height: 29 cm Weight: 987 g Replacement cycle: every 3 - 6 months Includes RFID chip Compatibility and accessories Replacement for Xiaomi SCG4021GL Content of delivery: 1x combi filter (pre-filter + HEPA + activated carbon) Installation Easy to install Usage Designed to neutralise unwanted odours, smoke, and vapours Pre-filter protects the filter medium from coarser particles such as hair and skin particles HEPA filter extracts the smallest particles from the air