Compatible with the Hitachi, Maxell, and Dukane 456-8931WA, 456-8934, 456-8933W, ImagePro 8933W, ImagePro 8934, ImagePro 8938W, ImagePro 8939, CP-EW300, CP-EX250, CP-EX250N, CP-EX300, CP-EX300N, CP-EX400, CP-EW250N, CP-EW300N, DT01433, and DT01491 projectors. Easy Installation: Replacing the air filter is straightforward, making it a convenient task during regular maintenance or lamp replacement