1Silicone Steam Ring: Good elasticity to prevent cracking, high and low temperature resistance and good aging resistance. Fits most modern E61 group heads. Combination gasket compatible for Gaggia coffee machine. 2Last Longer: Made of silicone material, which is easy to remove and easier to install, it is no BPA, more durable, more resistant to high temperature than ordinary rubber gaskets, and has a longer lifespan. 3Leak Proof and Durable: Our silicone grouphead ring is soft and fits firmly and tightly after installation, no water will overflow. Prevents water leakage during the use of the coffee machine. 4From Cold To Hot: Our silicone steam ring stands well against constant exposure to extreme temperatures. It can handle a range of as low as 65F / 54C to as high as 450F / 230C. 5Kitchen Essentials: Silicone gasket is a must for life and kitchen, and any set of gaskets needs to be replaced, so having a spare steam ring on hand is essential.