This is a Cavision Lens hood and filter holder. It appears in good condition with no broken bits or cracks. I do not know anything about this so please ask questions. Can not find any model number or other identifying info on this unit. I will include some measurements. The mounting hole at the back is 3 3/8" in diameter. The slide in filter holders are 3 7/8" X 3 1/8". The lens hood flap is 11 3/4" Wide X 5 3/4".