KEIHIN / MIKUNI. UPRATED FUEL / AIR MIXTURE / PILOT SCREW STAINLESS WASHERS X 5. These are the best quality UPRATED washers, in the exact size and thickness as the original part - but in stainless steel, a higher performing and more resistant material than the original mild steel washers.
The "KEIHIN MIKUNI Carburettor Fuel Air Idle Pilot Mixture Screw Stainless Washers x5" would be suitable for use in automotive applications requiring precision adjustments to the fuel-air mixture.