ăAdjustable Nozzle DiameterăThree PVC pipe sleeves are provided in the set. The sizes are 1.5", 1.9". Choose a suitable tube sleeve according to the diameter of the umbrella pole, and then tighten the two fixed knobs on the umbrella base, so that the umbrella pole will not shake even on a windy day.
ăDurable and Rust Proof Materialăumbrella base insert rings are made of durable HDPE plastic which is not easy to be corroded, and umbrella base insert rings have features of high temperature resistance and weather-resistance.
ăWide applicationăthese rubber adapters fit the market standard umbrella base pole diameter. Pole adapters can fit into most cantilever umbrellas with more choices at outdoor space, such as beach, backyard, balcony and poolside
ăSimple Installationă2 pcs pole covers to tightly fit umbrella pole in different diameters with combination on your demand. install pole covers according to your pole diameter, Post-Screw for Umbrella Base Tube and adjust knobs to fasten as to prevent Umbrella's Slipping.
Put it in place then added the umbrella, tightened the screw and not only is the umbrella secure and straight, this piece works 100000x better then the thin piece of plastic that came with it.