Features: Engineered for E61 coffee machines, this silicone gasket ensures leakproof sealing and optimal coffee extraction by preventing water leakage and air bubbles under high pressure brewing. Crafted from heat resistant silicone, it maintains elasticity and corrosion resistance for long lasting performances, outperforming traditional rubber seals. Ideal for home baristas and professional coffee shops, it guarantees consistent brewing quality for espresso enthusiasts and commercial grade machines. Perfect for daily use in home kitchens, office coffee stations, or busy commercial cafes, it adapts seamlessly to high demand environments. Easy to install and clean, its smooth surfaces resists coffee oil buildup, ensuring maintenance and reliable sealing for richer, aromatic espresso every time. Specifications: Material: Silicone Inner Diameter: Approx. 2.24inch(5.7cm) Package Includes: 2x Coffee Machine Sealing Rings note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.