Fits perfectly, it was hard to remove the screw to replace the gasket, so you might want to do that first.
If your machine is leaking from the area around the brew group and coffee filter this is the part you need.
Please check your machine series number before purchasing
50mm Steam Ring fits:
Die-Cast Programmable ™ BES830XL and BES820XL
Cafe Roma™ ESP8XL,
Cafe Modena™ ESP6SXL