I purchased this umbrella thinking it was ok to use with just the crossbar base that is shown in the pictures. It doesn’t have a disclaimer anywhere that the base is required..just suggested.I wasn’t aware that it required a special base to go along with it. 
The umbrella is lovely…but very heavy. You have to adjust the bar and snap a cover over it every time you open or close it.
I purchased it for my deck, and unfortunately cannot use it as is.
Cannot return because I cut up the Box, and shipping would be too expensive. 

Very disappointed.  
***Word of warning*** this is not an easy umbrella to open and close.
 Keep that in mind when ordering.