Replacement Air Filter for the 003-004774-01, 003-005053-01, DHD951, DHD951-Q, DWU951, DWU951-Q, DWX951, DWX951-Q, DXG1051, DXG1051-Q, DHD851, DHD851-Q, DWU851, DWU851-Q, DWX851, DWX851-Q, and SWX851 Christie Digital Projectors - 003-004775-01 Easy Installation: Replacing the air filter is straightforward, making it a convenient task during regular maintenance or lamp replacement