This is a brand new camera housing sun shield.  Comes with rubber mounting gasket/padding.  Fits the mini dome (SM2 models) from CNB and possibly other domes as well.

This is aluminum.  Measurements right at 7 3/4" on the wide end and 3 3/4" on the small hole (camera dome opening).

Please check out my other CNB camera parts in my other listings.

Please ask more questions if you have them