I ordered 2 of these lamps. One was ribbed as the picture shows, the other was not. Melissa was kind enough to replace the item. Unfortunately, when I opened it, it was not ribbed either. I used to praise the customer service and quality at Wayfair. I have been dealing with the same issues (different from the lamps) for almost 3 months.. I understand that they are experiencing challenges due to COVID19, however, 3 months is a bit extensive on a large order. I hope to have my issues resolved soon.