Package contents: you will receive 2 x silicone umbrella hole ring and 2 x caps. These small items are space saving and convenient for storage or carrying. Enough Terrieba spare parts for your needs. Standard size: our patio pen hole cover sets for outdoor glasses or acrylic tables with 2 inch / 5.08 cm holes. Suitable for standard size umbrella poles. RELIABLE MATERIAL - The terrade desk rings are made of high quality and soft silicone to ensure an easy assembly, and the remaining ones of the roof hole are made of durable plastic to seal the hole perfectly.Both are very durable, so you can use them with confidence. Easy to install: the installation of roof hole rings does not require much effort. Since it is flexible, you can easily attach it with the hole of your patio table. It is recommended to put it in hot water before installation to make it softer, and it will be easier to install. Practical hole ring set: you can fit into the glass table and do good work, which makes the umbrella fluctuates and better prevent scratches on the table on the table.