Christie Digital 03-001982-51P Lad Filter For CP2220 For use with the Following Christie Digital Cinema Projectors: Size: 2-1/2" x 2-1/2" x 2-1/2" The replacement air filters adopts rubber frame and combined synthetic fiber, which is low pressure drop and arrest very fine particles effectively. The replacement filters should be changed once every three months, therefore it extend the lifetime of the projectors. We have automatic production line, and we can produce the cartridges with different specifications. If the material is PP, PET, PE, panel height ranges from 8mm to 90mm. For glass-fiber kind of filter cartridges, brackets figure shows the finished product filter thickness. Max width: 710mm; indefinite length.