This object consists of two pieces. There is an outer 7/8" high cylinder and a inner piece with a circular plate that has a small solid cylinder in the center, and two sets of three connector holes on two sides. One of the sets of three has three wires with white insulation and the other has two with white insulation. Underneath this is a ceramic U-shaped frame that has two silicon chips mounted on a small metal bar with a copper shadow mask mounted above it. There is a paper label on the plastic container box which says, "Special for 304 Collimator(?) OD160-1 material."