Features: Premium silicone rings withstand 200°C heat for leakproof sealing in coffee machines, suitable for brewing units, steam valves, and support valves. Each set includes 100 food grade silicone seals and cleaning brushes, designed for precise fitment across components. Ideal for home baristas, cafés technicians, and enthusiasts maintaining machines to ensure optimal coffee extraction and machine longevity. Perfect for daily espresso brewing in kitchens, commercial coffee shops, or office environments requiring reliable valves and grouphead sealing solution. To simplify part identification while meeting strict food safety standards for odor free coffee preparation. Specifications: Component: Silicone Diameter: Approx. 1.57inch(4cm) Package Includes: 100x Coffee Machine Gasket 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.