The info he sent is that the bottom bracket fits a 68 mm wide bottom bracket shell and is English threaded (1.37" diameter cups with 24 threads per inch). This is standard on most road bikes and certainly on all Cannondale road bikes. He didn't include the spindle length but if it's the correct bottom bracket for the crank that accompanies it you should be ok.

BTW, be aware that English bottom brackets have LEFT-HAND threads on the drive side (the side with the chainrings and chain) so the cup threads in counter-clockwise. The non-drive side cup has standard right hand threads.