This is a new, unused item. One box has been opened, containing 2 pieces, and there are 2 unopened boxes, totaling 6 pieces. The boxes show signs of aging due to long-term storage. It has been stored in a smoke-free environment. Hitachi Genuine Cleaner Paper Pack Nanotech High Dust Collection Premium Sanitary Filter (Kobosan Pack) 2 sheets per pack x 3 sets New Hitachi Genuine High-Performance Nanotech High Dust Collection Premium Sanitary Filter 6 sheets High-performance filter using nanotechnology to maximize cleaning effectiveness. - Brand: HITACHI - Model: GP-2000FS