I recently purchased a chrome brake master cylinder and & 7" booster. It was advertised having a 1" bore. The one I received has a 1 1/8" bore. Part #MC2911C. I called to tell them I received a 1 1/8" and all they want to do is argue and say they don't sell anything but 1". One look in the supplier's catalog (MBM) show's part #MC2911C as 1 1/8". Horrible customer service!