Custom made piston ring to fit:
2-1/8" Bore x 1/8" x 5/64"
Turned from fine grained Meehanite cast iron bar, Piston ring blank is then split and gapped, heat treated to relieve stress and set the open ring gap, then finally the ring gap is rechecked in a bore gauge for a perfect fit.
I have many other sizes of imperial sized piston rings for all steam loco's / steam plants / custom builds etc, if there are any your after give me a shout... i may just have one!