Matches original U67 mounting dimensions exactly, excellent sounding transformer. I heard it with a Neumann capsule next to a real U67, and it was right there with it. A real improvement over the AMI, which is brighter and thinner in comparison to a Neumann in the various samples I’ve heard. Neither is it darker to any degree. Great for a U67 restoration or a U67 clone, it is the exact size and mounting method of the real thing. These are $210 or more new from Moby, depending on how shipped to US. $160 plus shipping/insurance.