Feature:1. High Temperature Resistance: The o ring is made of silicone, which can withstand high temperature environment without deformation or loss of elasticity.2. Waterproof: The silicone o ring can effectively prevent water vapor, water droplets and other liquids from infiltrating into the coffee machine components under the o ring.3. Sealing performance: The o ring adopts precision manufacturing process to ensure that the contact between the o ring and the coffee machine is tight, the sealing effect is good, and the leakage is prevented.4. Durability: The silicone o ring has excellent durability, can maintain its sealing performance and waterproof function for a long time, and is not easy to age, harden or break.5. Safe and Reusable: Silicone material is non toxic, tasteless, and safe, to ensure that when used will not have any adverse effects on the taste and health of coffee, can be reused.Specification:Item Type: Coffee Machine O RingMaterial: SiliconeWeight: Approx. 39.00g / 1.38oz.Package List:120 x Sealing Rings(100pcs small sizes + 20pcs large sizes)