The connectors on the syringes leak air and oil. This system is good for a single use bleed at best. I added small zip ties to both ends of the connectors get the best results. I was only able to get one bleed out of this kit before it was leaking so bad I threw it away. It was still a cheaper option than my LBS but I can count on my LBS. Perhaps the pro kit is better. I would not recommend this kit.