Set Include: 3Pcs Silicone Gaskets Condition: Brand New Material: Silicone Tag No.— —Outer Diameter— —Inner Diameter— —–Thickness- -Type A— —–2.2” 5.7cm—- —–1.8” 4.6cm—- —0.1” 0.26cm -Type B— —–2.6” 6.5cm—- —–2.2” 5.5cm—- —0.1” 0.26cm -Type C— —–3.0” 7.5cm—- —–2.6” 6.5cm—- —0.1” 0.26cmO-ring design with good elastic, easy to install and replace. Please confirm the size before placing an order. The removable sealing gasket is embedded in the middle of the cup lids for seal, providing a good closure and air-tight seal. 3 pieces of seal rings in a package, 3 sizes to choose from. Single part is convenient to replace your old or damage one. Made of food grade silicone material, heat resistance, non-toxic, not easy to break or aging, durable. 3pcs food grade silicone O-ring bottle lid gaskets replacement durable leak-proof seal rings for vacuum cups water bottles.