Have the lamp purchased in a furniture store for about 100 Euro and quite unlucky with the quality. After the lamp was not just hanging on the ceiling above the dining table partout, I have laboriously screwed glass screens removed and weighed times. The outer shape of the single lampshades Although reasonably the same but the weight not. The heaviest of the six screens weighed ample double the lightest and only two had almost the same weight. That explained the difficulties. But the arms and versions were slightly different aligned so that resulted from the dining table from an unhappy wry and crooked picture of newly acquired lamp. That may have been a bitter disappointment after I thought he had finally found the right piece. I wish you better luck with the quality because it has me really as it hung in the exhibition very much.