Features: *Application: These filter accessories are specifically designed for use with the for Pure Enrichment for PureZone Halo Air and are not compatible with other models. Please ensure that you have the correct model before making a purchase. *Filter Size: The filter has a diameter of 20.6cm8.11in and a height of 2.54cm1in. It fits smoothly into the chamber with a slight difference of 0.05-0.1cm due to manual measurement. *Filtration: The 2-in-1 combination of an activated carbon pre-filter and H13 level filter can effectively capture and remove 99.97% of dust, pet hair, smoke, and household odors as small as 0.3 micrometers. *Warm Tip: Washing the filter may alter the effectiveness of the filter. It is recommended to gently wipe the surface with a wet tissue and allow it to fully dry before reuse. *What You Get: This package includes 2 replacement filters, each with a lifespan of up to 180 days. Please note that the actual duration may vary depending on the usage. Specifications: *Product Name: Filter for Pure Enrichment for PureZone Halo Air *Material: Contains 2-stage filtration system including activated-carbon Pre-filter and H13 True filter *Size:Diameter - 20.6cm/8.11in, Height - 2.54cm/1in *Color: black Package Content: 2 empty filters/4 air filters Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.