Best quality piston ever made! Made to 0.005mm precision and the best finish level of all.
It depends on the bore quality of your cylinder of coarse, but sometimes these can be fitted with 0.03mm tolerance. These were used by many top teams in the 90's and early 00's.

Any shipping can be combined! Please request the combined invoice if you have bought multiple items. (And don't proceed with the payment before you got the combined invoice!)