Toyo Aluminum Dust Removal Filter for Ventilation Fans 5.9 inches (15 cm) x 3 pieces (3 pieces x 3 pieces with paper included for a trial or regular use ● This product is designed to prevent dust stains in bathrooms, dressing rooms, and bathrooms. The adhesive type filter makes it easy to install just like a sticker. Made with non-woven fabric that is mildew resistant and antibacterial processing. Toyo Aluminum Just Peel and Stick Dust Filter for Ventilation Fan, 5.9 inches (15 cm), 6 Pieces x 3 Pieces