【54mm Silicone Steam Ring For A Variety Of Espresso Machines】Combination gasket compatible Breville espresso machines 870/878/880/860/840/810/450/500/ Sage 500/810/870/875/878/880. 【Silicone Steam Ring】Clean cut and just the right 54mm size silicone steam ring is made of high-quality silicone material, which is easy to remove and easier to install, it is more durable, more resistant to high temperature than ordinary rubber gaskets, and has a longer lifespan.