【Product Description】 By rotating the cover and changing its direction, the airflow is maintained while significantly reducing wall soiling caused by drafts. The cover, filter cartridge, and main body cover can be removed entirely, making cleaning easy. Two types of filters are available: a high-airflow net filter and a pollen removal filter. A built-in airflow adjustment plate allows for design flexibility. It has a 3-stage (stage 1, stage 2, and closed) airflow adjustment function. 【Product Specifications】 Color: White Material: Polyester Remarks: Pollen-resistant, Applicable pipe = Ace 150 (inner diameter φ152) 【Shipping Information】 Quantity: 5 pieces/set Individual item shipping: Not available 【Category】 Hardware Ventilation Openings/Holes Ventilation Components Catalog: Ace Architectural Hardware General Catalog (Ace Architectural Hardware General Catalog 2021) Series: Ventilation Openings JAN code: 4560367984192 【Product Notes】 It is recommended to replace the pollen removal filter every six months. Pollen removal filters for 100(150)FK are available for order in sets of 1 (5 pieces).