Shims fitting Mikunis 4-, 5- and most 6-needles.
Does not fit Mikunis 7-, 8- och 9-needles. Neither OEM-racks like BS, BST, BSR and more. For those, Keihin-shims are a better fit.
If you are unsure, meausure your needle and see if the shims fit.
Physical mesaurements
Outer dia 5.8mm
Inner dia 2.6mm
Thickness 0.6mm
On img 2 you can see Mikuni-shims to the right and Keihin-shims to the left