- Compatibility: Silicone Steam Ring fits Breville Espresso Machine models 878/870/860/880/810/840/450/500 and Sage models 880/878/875/870/810/500. - Superior seal: Installs easily into the groove to form a tight, solid seal and prevent moisture leakage during steaming. - Safe materials: Made of food-grade silicone, BPA-free, designed to prevent chemicals from leaching into your coffee. - Durability and heat resistance: High-quality silicone, more durable and heat resistant than ordinary rubber gaskets; operating range -65 F / 54 C to 450 F / 230 C. - Easy maintenance: Simple to install and remove for quick replacement and cleaning. - Use scenarios: - Home use: replace worn gaskets to maintain a consistent steam and milk texture. - Small cafe or office: reliable seal during multiple consecutive milk frothing sessions. - Travel or spare: keep a backup ring to restore performance on compatible machines.