3" on the large end and 2" diameter on the small end. 1-1/8" wide.
This will accept a spring that is 2-3/8" OD down to 1-1/2" ID
Much cheaper alternative than OEM from Ammco, Accuturn, FMC etc.
If you need some other sizes, let us know as we can custom make to your desires with fast turnaround!