Compatible with various espresso machines - 54mm silicone steam ring compatible for espresso machines 870/878/880/860/840/810/450/500/ Sage 500/810/870/875/878/880 Safe alternatives-Silicone Gasket is made of food grade silicone, You don' have to worry about chemicals leaching into your coffee. easy to remove and install, more heat resistant and longer lasting than ordinary rubber pads The soft silicone vapor ring fits easily into the grooves, creating a tight, secure fit to no moisture escapes. Forms a tight, firm fit to no moisture escapes The grouphead gasket replacement part can handle a range from as low as -65F / 54C to as high as 450F / 230C. You can use it for long periods of time. The actual product may have slight color difference or difference, which will not affect the use Colour:Photo Color Material:Silica gel Package Contents: 6 x Silicone Steam Rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.