This is a large glass cylinder that is used in a larger ceiling lamp from the German brand: Doria Leuchten. The cylinder is 16.0 cm / 6.3 inch high and has a diameter of: 4.0 cm / 1.6 inch. The inner diameter is 3.5 cm / 1.4 inch. A hook has been placed in the top edge of the glass with which it can be placed on the larger luminaire. A recess is cast in the top edge of the glass, see the photos. There is also a photo of what the Doria lamp should look like in its original state.