The parasol base is specially for use with middle-hole tables.The tough plastic shell makes it suitable for outdoor use, with a concrete filling so it stands the parasol sterady in place. Features a tightening knob - once the umbrella is in place, all you have to do is tightening for full security. Thanks to the rubber foot pads, extra friction to the floor, this patio umbrella stand keeps in place even more.For garden parasols with canopies up to 2.5m diameter, with 32mm-38mm diameter sized poles.