Strong Umbrella Stabilizer - With these stabilizers, the umbrella pole will fit in the stand base more tightly that avoids potential accidents or damages to the umbrellaEasy to Install - Only 2min to set up. 3 Steps: 1. put the base stabilizer into the bottom of the umbrella stand base. 2. Pick the right size from the included 2 sizes of ring parts (separate them first), and stuff it on the top of stand base. 3. put the umbrella into the base, and use the given thread to tight upWide Application - The umbrella hole ring plug is suitable for most umbrellas such as beach umbrella, market umbrella and traditional patio umbrella. The strong material allows the adapters can be used in wide circumstances such as beach, balcony, backyard and poolsideMaterial: Metal+plasticcolour: blackPackage Contents:1 x Replacement Parts kit(8pcs)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.