Description says it fits all 9' umbrellas, but in fact the collar prevents me from being able to access the 'horizontal swing' motion of my cantilever umbrella...otherwise, I'd have given it 4 stars.  Getting sand into this unit is a time-consuming pain, since the opening is fairly small...definitely need a funnel to help keep things neat as you go. Overall, it's well designed and the wheel on the bottom is a back saver!  Note: the cap locks so be sure you have all the sand in before you put the cap on.