Featuring good anti-scratch properties, this umbrella hole ring can effectively reduce the friction between the umbrella the patio table causing scratches dents on the umbrella pole, eliminate the noise of friction. Due to the good toughness of this umbrella hole ring, it is very wear-resistant which can be used f a long time. Besides, it can also fix the umbrella reduce the swing caused by the wind. It is made of high-quality PVC rubber material. There are 3 sizes f your reference. It is perfect f coffee shops, bars, milk tea shops, yards other glass outdo patio tables, patio umbrellas, even me options. Item Name: Umbrella Hole Ring Material: PVC, Rubber Features: Anti-scratch, Wear-resistant, Simple Installation Size Details: Rubber Hole: Height: Length: 5.74cm/2.26", Diameter: 3.8cm/1.5" (Approx.) Table Hole Plug: One Part: Diameter: 6.3cm/2.48", Height: 1cm/0.39", Other Part: Bottom Diameter: 4.2cm/1.65", Height: 1.5cm/0.59" (Approx.) Notes: Due to the light screen setting difference, the item's col may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: Style A/B: 1 Set of Umbrella Hole Ring (2 Parts) Style C: 1 x Umbrella Hole Ring