This is a genuine replacement filter for the UNIX KRP100. I purchased it new, but I am selling it because I no longer need it due to moving. ● Brand new, unused, unopened box of 5 filters + 2 unused, opened filters ● The filter itself, instructions, and box will be included and shipped in an envelope. ● Please understand that this item has been stored at home. 【Product Details】 ・Ventilation opening size: □ 146mm (Duct diameter: φ100) ・Filter size: φ94mm ・Filter: Non-woven fabric filter (for coarse dust and pollen) ・Collection efficiency: 60% (Mass method / JIS 15 types) ・Cleaning: Washable with water 　　　　　　　　Wash with water up to 3-5 times, then replace with a new filter. 　　　　　　　　※ Filter dirt varies depending on the region. UNIX replacement filter F100A-KRP, 100mm diameter, 5 filters, brand new, unused, square register ventilation filter, air supply filter