Included instructions are very spare. I used trial and error to select the appropriate plastic piece to fit the circumference of the umbrella I bought. This base comes with about three different adapters to fit the various widths of the umbrella poles. Initially I selected one that wasn't tight enough, but I found one I had originally discarded -- in the trash, just in time -- and it fits well, nice and tight. It's important to really tighten the side screw so that nothing gets airborne. Overall, satisfied with this purchase.
- How did the color on site compare with the actual product? Accurate
- Please tell us about the quality of the product. Good
- How accurate was the on site description of the product? Good