BSA Bantam D10-B175 Piston Rings standard. These are Nos Rings. These rings are for the 2 ring domed top piston as fitted to the D10 to B175 bikes, rings are approx 1/16"wide. Other sizes are available along with the 2 and 3 ring option and the earlier D5 to D7 rings. Please note these rings will not fit the earlier flat top piston fitted to the D5 and D7 bikes, ensure these are the correct ones for your bike.
