I had the Uro seal in my hands, and it was the exact replica of the genuine ATE seal I pulled from the brake booster. Fitting was also perfect and tight. The other option is a red seal unbranded, of which I've read about an owner that he had a very hard time fitting it. These are the two options available. Otherwise it will take a complete new booster from ATE but more importantly, it will need removed from the car. Especially on the right hand driving cars, this may be a difficult task. So the seal route is not only the easier one - as long as one manages to replace it which is not very obvious - but also a much cheaper one, even for DIY. Again, just my opinion, at the end of the day everyone is making their own choice. Cheers