Compatible with designated air purifier models, tight fit without loose gaps inside the unit. Balanced air resistance design will not interfere with the unit’s standard air output during filtration. Space-saving storage design; can be placed flat or vertically when not in use, taking up little storage room. Integrated carbon cloth composite construction prevents carbon layer shedding and delivers consistent long-term performance. Sealed packaging safeguards the filter against scratches and impact damage during transit., Manufacturer: QIANWENSHANUI