The silicone seal rings are essential for maintaining the airtight integrity of your vacuum cup. great for stainless steel and insulated cups, these sealing rings ensure that your beverages stay hot or cold for extended periods. Simply replace the old gasket with the new one to enjoy a leak-proof experience, making it ideal for travel, work, or outdoor activities. Features -Color:White -Material:Silicone -Size: 6.00X4.50X0.25cm/2.36X1.77X0.10in -Inner diameter: 4.5 cm -Durable silicone: made from silicone, ensuring safety, reliability, and durability for everyday use - sealing performance: the grooved design and sealing ring structure effectively prevent leaks, maintaining the temperature and taste of your beverages -Versatile use: suitable for various cup types, including insulated bottles and space cups, offering convenience and practicality for different needs -Easy to clean: the simple design allows for easy disassembly and cleaning, ensuring the lid remains clean at all times -Safety assurance: undergoes rigorous quality testing to meet safety standards, providing peace of mind for safe usage Package list: 4 x sealing ring