8mm x 1.25 long
I bought and installed Goodridge part# SB8125L. Available from Fast eddy Sports - Quality Products, Quality Customer Service AND a Great Price with Shipping U.S. Included! 6.95$ a pair, and their made in USA. work like a charm, very fast job using a vacuum pump.
Just FYI . . .
I prefer reverse bleeding as I feel it works better and faster, especially regarding air bubbles.
These do not work. Besides, manual tightening is not difficult and more positive IMHO.