819M-CV-2.5 Flat Black Coated Protective Cover, 2.5" Port

The 819M-CV-2.5 (P/N 7Z08281N) Flat-Black Coated Protected Cover is used to cover the 2.5" port for preventing dust and other contamination from entering the integrating sphere. With the flat-black coating on the inner surface of the cover, it also provides an excellent simulation of an opne port during measurements, while preventing errors caused by ambient light.