For 32mm-38mm diameter poles, between table design: Parasol base is specially for use with middle-hole tables. Parasol canopy sizes up to 2.5m diameter. Includes skus X-84D-017 and X-84D-097. Measure pole and canopy before purchase.Tightening knob: Easy to adjust the wheel on this outside umbrella stand, keeping your umbrella standing steady in place.Plastic shell, with concrete filling: Parasol base is tough and sturdy - holding your umbrella in place. This umbrella base is suitable for outdoor use.Rubber foot pads: Extra friction to the floor, this patio umbrella stand keeps in place even more.Dimensions: 31H x 36L x 36Wcm. Pole 26.5H x ?4.8cm. Easy to assemble.