003-001184-01 Light Engine Replacement Air Filter Size: 11.2"x 9.6"x 0.9" We strongly suggested to exchange filters every three months to increase the life of projector. Medium Material: Polyester Fiber To Install Refer to Projector's User Manual Do Not Use if Broken or Deformed Exposed Stacking Prohibited Follow Indicated Airflow Direction The replacement air filters adopts craft cardboard 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.