The 25kg black concrete base is ideal for holding your parasol in place. This parasol base will fit all our centre poles up to 48mm, the adapters included will allow smaller poles 38mm and 35mm to be used. All our bases have screw in feet on the bottom of the base which provides elevation from the ground. Additionally, the parasol can be held in place with a tightening screws which will hold the parasol in place.