Features: The umbrella hole Rings is make of soft silicone to ensure easy assembly, and the Caps is make by plastic to seal the hole.Suitable for glass or acrylic tables with 2inch holes; Suitable for umbrella poles standard size.These small items is space saving and convenient for storage or carrying.Easy to use: As its flexible you can easily fixing it to the hole, it is recommended to put it into hot water before installation to make it more soft.Suitable for stabilizing patio umbrellas, reducing and preventing scratches or unstable umbrella poles; Suitable for patio garden outdoor table.Specifications: Materials: SiliconeOuter Diameter: about 61mm/2.4inchPackage Includes: 1set Umbrella Hole Ringsnote: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.